And here we are again, bracing for impact but hoping for the best: that Hurricane “Paul” (which is striking the Baja California peninsula as we speak) will keep to its trajectory and will avoid us completely, but it has happened before that some hurricanes simply jump over Baja’s Vizcaíno mountainous range and land square face on us. On the image below (courtesy of The Weather Channel) you can see Hurricane “Paul” is already causing damage on Baja, but the projected trajectory states it will move away from Baja and dissipate as it hits the cold California current.

Anyway, we have to prepare for the worst –as always- and we are removing our farm’s flotation and everything off our land facilities yet again (we had done this twice already in the month of September), so there is this little problem with our Pearl Farm Tours: it won’t be the full experience that we always want it to have, since we will have everything “packed up”. Once more we apologize to our visitors for this inconvenience.

Gilberto A.C.: Helping Others

And speaking of “packing up”, we have to tell you all about our up and coming trip to Mexico City for the week of October 22nd to the 27th, and this of course means we will not have any “pearl farm” tours available during this week. We expect to resume our normal Pearl Farm Tour schedule on October 29th, as soon as we are back from our trip.

If you have read our Blog before you probably know that we sometimes leave the farm to head off to certain events such as Gems Shows & the Pearl Ruckus, but this time we have been invited over to a special event known as “Bazar Gilberto Navideño”. The organizers of “Asociación Gilberto A.C” have been promoting this special Christmas Bazaar since 1993 in a constant effort to raise money to help out the communities that have suffered from the disastrous effects of hurricanes; actually the name “Gilberto” derives from the first time when this association started to help when hurricane “Gilbert” struck many Mexican States in September of 1988, with a destructive force yet to be equaled (at least in this country).

So, once this organization finished helping out there was yet another hurricane the next year, then unusual floods, and ever since we’ve had one natural disaster after another and this organization kept its internal structure and objectives, but with a continuous effort to help those in need. This Xmas Bazaar is a means to raise funds and all exhibitors will be there with the same frame of mind: Helping those in Need. Here you can see some photos and read a bit (in Spanish, but you can easily translate with Google/Bing) about last year’s event.

I also have a video to share: made

by Gilberto A.C. of the Veracruz branch, where we can see how they are helping the poorest communities with housing projects and installing much needed services in order to improve the lives of thousands. It is in Spanish language, but an image is worth a thousand words and not much more is needed to appreciate their work.

So, we feel honored to have been invited by Gilberto A.C. and we hope this event will be as successful as it has been in its 20 year history.

Wish us good luck and we’ll see you soon at the pearl farm in the Sea of Cortez…

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Continuing with the subject of “pearl culture and the environment”, we will now talk about some of the reasons why a farmer will not want to culture his pearls for a longer period of time, and also of how a pearl farm can affect the environment: but remembering that this can be in either a positive or negative way.

Behind every great Pearl there is a Great Pearl Oyster…

1. By “growing” or raising young pearl oysters (usually known as “spats”)
2. By means of the Fishing of Wild Fully-Grown Pearl Oysters (adults)

The Pearl Cultivation Period

1. Water pollution: oil spills, water runoffs with fertilizers/pesticides, etc.
2. Environmental disruption: that can be as dramatic as a tropical storm (hurricane) or a tsunami, or even something as subtle changes in ocean currents or extensive climate changes (such as those caused by a “El Niño” or “La Niña” year), which can range from the partial destruction of a farm (see our series of posts on “Pearls and hurricanes”) to massive pearl oyster mortalities, or that prevents their development, the growth of pearls or their lack of beauty.
3. Accidents: at times – and we do know of this – a commercial fishing boat may simply decide to fish on your farm, and become entangled with your aquaculture gear; this –of course- only happens if the ship’s Captain decides that he does not want to respect a no-fishing zone and does so at night, when there is no visibility. This has happened to us.

The “Right Time”: No more & No less

Thus, if a farmer has to produce pearls for 4 years – as we do – the risks simply accumulate, day by day. On the other hand, if the producer is dedicated to extract wild oysters and subsequently produces pearls with a short cultivation period (4-10 months) then his risks are minimal. The issue here is to find the correct thing to do: have the right time to grow good quality pearls and have a TOLERABLE risk. But, I have yet to mention to another “party” or 3^rd-person involved in the industry: the environment.

1. Do some species disappear or some (new ones) appear?
2. Are there are any changes in the ocean’s floor (smell, color, grain size)?
3. Are there any physical and chemical changes (salinity, pH, dissolved oxygen) in seawater?
4. Are your oysters healthy?

• By using “spat” or pearl oyster juveniles: this can be done by either collecting juveniles from the environment or through the purchase of “Lab raised spat”, produced in highly specialized production centers;
• Fishing for “Wild Grown (adult) oysters”: these animals are usually obtained by fishermen that will sell the wild-raised pearl oyster to a farmer (at a price that ranges from cents to some $15 US dollars per oyster, pricing depending on multiple conditions) or by pearl-divers that are employed by the farmer. The preferred oyster sizes range between 10 and 16 cm (4-6 inches) in diameter, which will allow you to grow larger pearls.

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Just a couple of days ago a friend of mine –he is a retired Canadian farmer- and I were discussing the way the North American “Meat Industry” (beef, poultry, pork, etc.) had become misguided by the constant search of higher volumes of production (which, somehow, equal MONEY), but this was being done at the expense of both the animals and the consumers (all of us). Kurt began by telling me about his experience when dealing with local Animal Sanitation officers, about the indiscriminate use of antibiotics on cattle and the plain lack of “common sense” on the part of those involved in the industry. He told me: “I did not inject my animals with antibiotics, but instead I offered them land on which to forage, clean straw-bedding and care. My animals never developed the infections I was told they would suffer and they fattened better than those under the strain of antibiotics”. He cared for his animals and treated them with respect. Some in the industry seem to have noticed the same thing and have reverted to “the Old way”.

Just a couple of days later we were reading an “old” article written by Shigeru Akamatsu, a person with much influence in the Pearl Industry (being Counselor of the “Japan Pearl Promotion Society”, and he started as a pearl culture researcher under Kokichi Mikimoto’s leadership) and I felt this article tied in perfectly with the talk I had with Kurt, and thus this entry got its start.

The Reasons Behind the Changes

The article “Pearl Culture and the Biological Environment” (published in “Ship & Ocean Newsletter”#8G March 5, 2004) which can be downloaded in PDF format is quite interesting because it finally approaches the decline of the Japanese Pearling Industry in a way that is finally understood: the industry as a whole has to admit its guilt. No longer is guilt being laid upon the “wrath of Nature” in the way of red tides or mysterious diseases. And although Mr. Akamatsu does not mention it this way, I could read the word “greed” on certain paragraphs…but he never mentions this sin, rather handling it in a more political way by using a term like “in the pursuit of economic efficiency”.

Mr. Akamatsu states in this article’s first paragraph:

“Japan dominated the world’s cultured pearl industry for many years, but in recent times that state of affairs is changing rapidly. Though the rapid globalization of the pearl industry can be considered as one of the reasons, the primary cause is the deterioration of pearl farms caused by the occurrence of harmful red tides and the massive mortality of Akoya pearl oysters due to an infectious disease. Such phenomena relate not only to pearl culture, but also to BSE, carp herpes, avian influenza, etc., and may be the price paid for not treating animals as living creatures, in the pursuit of economic efficiency, as well as for incessantly changing the natural environment for the expansion of production.”

Akoya Pearl Farm in Japan

When pearl culture began in the early 20^th Century, the overall idea was to produce a natural pearl substitute but that would keep the attributes of the pearl: beauty and durability. Initially, pearl culturing periods were long (2-5 years) but many in the industry noticed that pearls with shorter culture periods still looked nice (1-2 years) but then they saw that most people could not tell the difference between “instant pearls” (4-8 months) and those with a longer culture periods, thus shorter pearl-growth periods became more common…and profits increased. Why would profits increase? This is something that every pearl farmer understands, but let me explain it shortly: each pearl oyster in your farm costs you money, every day.

In order to cope with mounting costs (labor, equipment & fuel) pearl farmers can use many strategies, such as:

1. Increase stocking density: you grow more oysters in the space you already have.
2. Decrease your Work-force: substituting manpower with machinery and equipment.
3. Decrease your Pearl Culture Period: you grow your pearls in less time.

Let us talk about the implications of each of these strategies.

Stocking Density

Growing more oysters in the same space you had may sound efficient: If you can fit 10 books in a box that once only held 7 books –thanks to a more clever way of arranging your books- then you have done this in a more efficient manner. But it is not necessarily the same with living organisms: animals –even plants- will thrive under adequate conditions, but overstocking/over-crowding will yield unhappy critters…and this brings about stress.

Imagine you live in a 10 x 10 meter room (sounds like a prison-cell, doesn’t it?) and all of your basic needs are fulfilled in this space that has a toilet, lavatory, book-case, table and chairs, bed and TV set. Now imagine you have a new guest, it may become uncomfortable but livable, but now: crowd the cell with 8 more “guests” for a total of 10 people…1 per square meter. Life becomes unbearable for all: can’t eat, can’t use the toilet nor watch TV nor reach for a book, then there’s the lack of food, stress, the smell and finally disease. Not a nice option…would it be nice for an oyster? Our mollusks don’t have brains nor conscience so they will not suffer any psychological damage, but their bodies will indeed react to overcrowding by displaying less growth (become stunted), will be less healthy and will become sick (ultimately they will die) and their pearls will lack beauty.

We can actually tell when an animal did not enjoy a healthy life when we see its shell and pearl: unhealthy oysters will have dull shells, without intense colors (the trade-mark of our “Rainbow-Lipped Oysters”) and their pearls will have dull luster and light colors. But overcrowding oysters is not the only factor that will affect their health: the environment (pollution, climate change, hurricanes) and disease (caused by parasites), but these are not under the control of a farmer. It is up to the farmer to have healthier pearl oysters by means of adequate stocking densities.

Infections are a major headache for producers: infected oysters may quickly infect their sisters & brothers under crowded conditions, and since overcrowding makes oysters weak –due to a combination of lack of food and oxygen- and parasites can easily “jump” from an oyster to many others if the distance is short.

In our case we hold our “Rainbow Lipped Oysters” under more than adequate conditions inside Bacochibampo Bay: we use less than 1% of the bay’s entire area and there are no other mollusk farms in the vicinity (the closest one is an edible oyster farm in Kino Bay, some 180 Km/112 miles away). We are making sure that our fledgling venture will not follow the same course as others, but let us see what has happened in other pearl producing countries:

The Cook Islands: here we’ll cite information about pearl-farming mortalities caused by overstocking (you can read the whole article by downloading the PDF file from the link):

“In Manihiki Lagoon, one potential stressor which may have been related to the onset of mortalities was the high stocking density. Prior to the disease outbreak the number of oysters cultured in Manihiki Lagoon was reportedly at an all-time high. In conclusion, our data suggest that an unprecedented disease outbreak in P. margaritifera [the Black-Lipped Pearl Oyster] in Manihiki lagoon in November 2000 was associated with vibriosis caused by V. harveyi [a species of Vibrio virus] and other opportunistic vibrios.”

Japan: When we began our experimental pearl farm in 1994 we heard about a “mysterious disease” that was killing the Akoya Pearl Oyster and that nothing could be done about this “viral outbreak”. The blame was laid entirely upon an “unknown virus” and you can read some of the thoughts of the time (taken from “NOVA: the Perfect Pearl”) on the following paragraph:

“Experts attribute the initial oyster deaths in 1994 to “red tide,” a bloom of microscopic, toxin-producing animals in the ocean that proved deadly to the oysters. Even after several years of scientific investigation, the specific cause of the disease remains a mystery. The illness first makes itself known when the abductor muscle, which holds the two parts of the oyster shell together, turns a reddish-brown. Ultimately, eight out of ten affected oysters die from the affliction, which so far has only affected akoya oysters. Others feel the oyster farmers themselves might be to blame. “The Japanese have always tended to place too many oysters too close together” wrote Andy Müller in the December 1996/January 1997 issue of Pearl World.”

So, in both instances we’ve seen that over-crowding –both your cages and your bays- leads to severe problems in pearl production. Why do it at all? Many reasons there are, but they are one and the same: the COST of floats, equipment (pearl culture cages), more workers (salaries), of paying for more “sea-rights”, the costs of moving away from densely packed areas into remote areas (devoid of many necessary services), but in the end they are all translated into the cost of producing pearls. If pearls kept a high value you would not need to grow billions of pearls, thus by producing more pearls the industry shot itself in the foot and a vicious cycle began to turn and churn.

Labor Costs

Adrian Amarillas holding a pocket net with Black-Lips

Many people believe this is a major solution to a company’s problems, but we believe this is really a big mistake. Companies are nothing if they don’t have people: they are made of people and one of the purposes of any company should be the production of well-paid jobs. Making money is not bad and should be a goal of every company, but it should not be the sole goal: there is a particular pride to producing pearls and the people that help you achieve this… become your trusted allies.

Farm-wise: without workers a pearl farm would just die. Pearl farming is a work intensive operation, involving divers, aquaculture technicians, farm-workers, mechanics, surveillance guards and many other people. Loose one link and the rest will follow. And pearl farmers usually work under very specific time constraints such as: the seeding season, the spat collecting season, harvest season, etc. This means that if you DO NOT finish a certain activity ON TIME you WILL NOT BE ABLE TO FINISH IT AT ALL and will have to move to the next one, ultimately this means it is highly unproductive and foolish.

And something I really want to stress here is that pearl farming is very artisanal in Mexico: very little machinery is employed. And we want to keep it that way for several reasons which many may approve and others will disprove, and it may be one of the reasons why we ended up with the Fair Trade Gems seal of approval (the only pearl –so far- in this list is the “Cortez Pearl”): we have very few jobs in Mexico. Our economy just doesn’t work because it is fueled by our exports (mainly raw-goods such as oil, agriculture goods and metals) and our cheap labor-force (which is also “exported” to other countries) in manufacturing for offshore companies. If we purchased machinery that would allow us to avoid hiring additional workers we would be a part of the problem, not a solution…so, even if this costs us more and makes us less efficient we will continue on this path.

In a future post we’ll explain a little more about our labor strategies.

Pearl Culture Period

The longer the pearl resides inside its “mother” or “host” oyster, the bigger it becomes and the more “pearl” (nacre) it will have…but this also means you must continue to grow your pearl oysters for longer time periods. Many sources state that the pearl culturing period in Japan took between 2 to 4 years to complete, the Akoya pearl ending up with a very good coating of 0.95 mm (Ward, 1995). This good nacre coating made it possible for the pearl to look beautiful, lustrous and have the endurance –basically, to pass the test of time- that all gems should have.

Cortez Pearls in Half

But many in the pearl-industry noticed that most consumers would not be able to tell the difference between a thickly-coated pearl and one with a thin-nacre coating. Thus, a bad practice was initiated in the industry and pearl culturing periods fell to –in some cases- down to less than 6 months (with a coating of less than 0.2 mm, once again Ward, 1995 is the source). This saved farmers a lot of money in wages & cages…but, was it really worth it?

This issue was addressed quite some time ago by many in the pearl industry, but a particularly strong voice was that of the late Australian Pearl Farmer & Consultant C. Denis George, who in 1971 stated:

“The Japanese technicians are insisting that this thin cultivation [of the pearl] does not make any difference in the appearance of the pearl, but in my opinion this is beside the point and does make a lot of difference in the principles involved and their material value in dollars paid by the customer in the belief she is acquiring a pearl of value… This resulted in many losing their trust in pearls, other withdrawing from the industry or going bankrupt; and many scores of thousands of women all over the world…became bitterly disappointed when their treasure faded.” (Excerpt from “The Black Pearls: History and Development”. 1971. Lapidary Journal).

Comparing Nacre Thickness of Akoya Pearls

From a farmer’s perspective, there are many situations that will make you consider against having longer pearl culture periods, such as:

1. Global Warming & Hurricanes
2. Pollution
3. Disease
4. Age of your Pearl Oysters

But regardless of these situations, a pearl farmer should have set his farm’s goal for nacre thickness and stick to it as much as possible. For instance, our pearl culturing period ranges from 18 to 24 months (after the moment the pearl oyster is operated), and this allows us to harvest pearls with an excellent nacre coating of 1.5 mm around the nucleus, although many pearls will grow over 2.0 mm of nacre, some will grow less than the 0.8 mm minimum acceptable standard. You really have to stick to this minimum culture period because you simply cannot accept anything below the 0.8 mm thickness mark…if the pearl falls below this number it has got to go down the drain (pearly gehenna: the pearls must be cast to the deep waters of the Sea of Cortez, where bacteria will recycle their materials).

Compare this to the Tahitian Pearl Ministry’s quality check for Tahitian black pearls in the year 2001:

“…the minimum nacre thickness requirement for all exported Tahitian pearls at 0.6 mm went into effect on Sept.1. The assembly voted to bump that minimum up to 0.8 mm beginning July 2002.” (“Tahitian Government to Improve Pearl Exports” by Victoria Gomelsky in Gemstone News. National Jeweler. September 2001 page 28).

This actually means that many in the pearl industry are –or were- producing pearls with a nacre thickness that is simply not adequate, and this affects those producers that are interested in keeping a high quality standard in their pearls, because –in the end- all pearls are considered as equals by many customers. Not so.

Final Thoughts

• Pearl Oysters are an important species in their local ecosystems, but too much of a good thing can ruin things for all so it is really important that you do not disrupt your environment’s carrying capacity by overwhelming it with billions of pearl oysters: healthy oysters will produce exceptional pearls.
• Keep your Local Jobs: If we were all able of making our companies thrive, then let us keep our local jobs truly local, by offering good wages and good working conditions; we might lose money by NOT having workers in other countries do the work we could on our own, but we would fuel OUR economy. If we all did our part our economy would grow and we would not have people leaving this Country for the one up north.
• Keep your Pearl Quality High: Good pearls are the first to go! Pearl buyers are always looking for the pearl of a lifetime…the pearl that will make them gasp in awe! Low quality pearls are good for trinkets or for feeding your local bacteria. Would like to finish this subject with a mention from the Bible:

Matthew 13:45-46

⁴⁵ “Again, the kingdom of heaven is like a merchant looking for fine pearls. ⁴⁶ When he found one of great value, he went away and sold everything he had and bought it.”

So, what do you think about this subject? Should producers consider the Environment as their Ally or as a “bloody nuisance”? What should you -as a pearl buyer- consider as a good trade-off? Please let me know your thoughts…in the comments area.

On our next post we’ll detail some of the reasons for not growing pearls for longer periods of time and some of the ways how pearl farming can affect the environment…both in a positive and a negative manner.

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Every day is an amazing opportunity for gazing into Creation and the perfection of Nature. When I look at sea-shells and their amazing patterns and their beautiful symmetry, or when I watch some little scallops swimming with grace or when you happen to see dozens of brown pelicans plunging into the sea all at the same time…well, it is understandable. But, sometimes you’ll end up having the same opportunity when examining the wares of a local street vendor in downtown Guaymas: it happened to me just the other day.

I sometimes walk the streets in downtown Guaymas looking for locally made sea-shell hand-crafts and this time I ended at Mr. Sansón Galindo’s curios shop; he has a nice selection of sea-shells and Mexican coins for sale, but something really caught my eye this time: just over a dozen or so hemispheres that displayed an intense golden color. I had to ask him about these because they looked very much like low-quality Mabe pearls from the “Penguin Winged Oyster” (Pteria penguin), a close relative of our beautiful “Rainbow Lipped Oyster” (P. sterna)… I actually began thinking this vendor was trying to pass off these “junk quality” Mabe for our “Cortez Mabe” but no, he was not. Instead he offered these as “Squid Pearls”.

Mr. Galindo and his "Squid Pearls". On the top-right corner the "raw" pearls. Below, the fully useable ones.

So, he told me about how these are collected by some fishermen and then left to dry up, are then “peeled” and finally sold. He told me these were “true Gems” and held up a key-chain of his that had two of these “pearls” crudely affixed with resin. I had to get one for analysis and for just $50 pesos (roughly $5 USD) the price was not a fortune to spend for a “true gem”. So I purchased a few of these for closer examination.

Provenance: the Origin of these “Pearls”

Well, if these belong to a squid, the most obvious source had to be a “Diablo Squid” as some fishermen call them, but more commonly known as the “Humboldt Squid” or Dosidicus gigas. We are quite familiar with these delicious critters because in Guaymas there is an important fishery of these mollusks, and we –even without looking for them- have been able to catch in the vicinity of our pearl farm…without much effort: you just have to be very careful they don’t tear your flesh to shreds with their powerful beak and they terrible spine covered suckers!

Bodily Origin

Well…these squid don’t have shells and they don’t even secrete any kind of pearl-like substance. The hardest parts of their bodies being the “beak” (looks like a parrot-beak) in the animal’s mouth and the “pen”, a translucent feather-like structure that offers the squid’s mantle a solid attachment point for some muscles (click on the link if you want to learn more about the Squid’s Anatomy). And every time we ate one of these we never found anything resembling a “pearl”. So, where could these “squid half-pearls” have come from???

Not a contact lens...but close enough: a peel from the squid's lens.

When I interrogated the street vendor he told me that these “pearls” were found inside the calamari’s eye. He showed me a couple of “untreated pearls” and these had some dried-up crust around them, once this was removed you could see the golden-colored “pearl”. An eye for an eye…aye, Captain! I guess it never occurred to me to cut open a squid’s eye, nor gulp it down with some lemon juice and chili sauce…that’s why I never found this item before!!! Eyes are usually discarded…aren’t they?

So, we now know where they come from…but what are they? Searching in my old textbooks I found that the only possible thing would be the “lenses” (described in some places as: …”a hard, marble-like ball object”). And it is such an amazing object…done perfectly. Its shape is a hemisphere, like that of a high-rise Mabe pearl (12 mm) and with a perfectly round diameter (14.6 mm). The dome of this lens displays a bit of iridescence, although it has cracked due to dehydration. A layer or protein flaked off the pearl and seems to have a thickness similar to that of a contact-lens. Its weight…being made of protein it feels very light (1.3 grams, a similar sized Mabe will weigh 2.2 grams). I just had to give it a name…”lens” is just too cold for this amazing object, so I gave it a new name: “CalaMabe” (joining the word “Calamari” and “Mabe”).

Beauty is in the Eye of the Beholder

A "Calamabe" and a true "Cortez Mabe"

But the beautiful part of it is not really its “dome”, but the flat, bottom portion of the “CalaMabe” this is the part that jewelers would use to attach the Mabe to a piece of jewelry, but this is the part I would NOT cover, this would be the part I would display. Why? Because it is here where you can see the “Eye”. What I call the “Eye” is a weird or perplexing thing because there is a unique optical effect there: you slowly move the “calamabe” to and fro and you will see as if there is a “floating-halo-like-eye” (think of the “Eye of Sauron” in the “Lord of the Rings trilogy”, excluding the Black Tower, the flames and the million screaming orcs) that follows you…truly mesmerizing. It might just…become…my preciousss…

The flat side af a "Calamabe" and a traditional Mabe

I was unable to capture this effect with my video camera, not having a good close-up focus, but if you still want to review the video it is here for you (the video’s audio is in Spanish at present, but will add subtitles in English in a couple of months, just after harvest):

Eye of Sauron? No! A Calamabe Pearl!

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One nice thing about writing this blog is that it has allowed us to dig into a treasure chest of memories that span all the way back to 1993…not a lot for some, but surely more than a lifetime for some. And during these last 18 years we have seen and done many things, but even more importantly: we have met and known many people. This is perhaps the most important thing we have done here, because we know we have been able to touch many people’s lives…hopefully in a positive manner.

In this sense, our “Pearl Farm Tour” has given our “Cortez Pearl” a great audience. In the year 2008 we gave tours to almost 15,000 people, and from 2002 to 2007 our average yearly visitors were some 9,000 men, women and children from an impressive list of nationalities: the United States of America and Canada (together being almost 85% of our visitors), Mexico, Guatemala, Belize, Panama, Colombia, Ecuador, Brazil, Argentina, Chile and Peru (the Americas) and from the Ole Continent we can list France, Spain, Portugal, Germany, Austria, Italy, Belgium, England, Scotland, Norway, Sweden, Poland, Russia and Turkey. From Asia: China, Japan, South Korea, Philippines and India. From Oceania: Australia, Cook Islands and Tahiti. And we believe this is an impressive list for this “small destination” known as Guaymas.

 And what made it all possible? Tourism of course!!! But this area draws a special tourist that caters for a “real” destination, not for the traditional “canned” destination. By this I don’t mean that a “real” destination is better than any other…just different, and there are people that will enjoy both kinds. An authentic destination will give you the whole enchilada: the sights, the sounds, the people…but also the smell, the taste, the heat and the cold & the insect bites. It won’t leave you feeling empty. And what a great opportunity it is to have this enchilada served with the best guacamole, refried beans and horchata: a packaged deal tour known as “The Copper Canyon-Sea of Cortez Tour”. You would get to see and experience the beauty of the Chihuahuan and Sonoran deserts, the Majesty of the Copper Canyon, the culture and flavor of towns such as El Fuerte or Álamos, and the peace and serenity of the Gulf of California in the town of San Carlos-Guaymas…this has been an incredibly successful tour since the 1990’s, drawing thousands of visitors to the area.

How the Pearl Farm Tour got its Start.

And this might come as a surprise to all the people that have visited us: it began as quite an accident. Back in 1994, when Enrique, Manuel and I were studying our Master’s Degree at the Guaymas Campus of Tec de Monterrey, we basically worked for hours (even until late at night, with only the moon as a light source) at the school’s dock, with our very basic tools and equipment: plastic buckets and trays, old kitchen knives, calipers and home-made culture cages. So, we spent countless hours getting a nice sun-tan and managing our small farm consisting of scallops, pen-shells and pearl oysters. Neither tours nor tourists…just us and our little critters.

 The accident was this: for many years –can’t really say how many- our Campus had a Kitchen-Lab for those students of the “Servicios Alimentarios” (Food Services), and they made all sort of goodies there: bread, wine, fruit drinks, a complete meal and dessert. This was done for them to learn…but after the learning they had all these goodies and they sold them every Thursday at the “Restaurant”. So, many students had a chance to enjoy a nice meal, but the American and Canadian residents in San Carlos would drive to our school to enjoy this good and inexpensive meal as well! Many of these temporary residents would go back to their country of origin –usually during summer- and return when the weather got better, and they would once more visit the “Restaurant”.

But, in 1994, our school suffered at the hands of the vilest enemy you can imagine: a devastating economic crisis. The number of students was suddenly reduced to about 120, because most families were struggling and could not afford to pay tuition & boarding for their kids. So the “Restaurant” closed its doors forever. But, many of the previous visitors were not told of this…and they came back, only to find their favorite lunch spot closed and they just started wandering around the Campus. I mean, you drive some 30 minutes and then: nothing. You have to at least try to justify your fuel usage! And these good folk would just walk down to the dock and saw these 3 tanned, long-haired kids just scrapping and measuring some animals and began asking questions…and that is how the tour got its start!

 I mean, we got asked all sorts of questions such as: are these for eating? Do they taste good? Why do they move like that? Whoa! Can they squirt water that far?!?!?! Does it hurt when it bites your fingers? Are you married? Or –my favorite- How can you get such a beautiful golden tan? (Answer: spend three years working under the sun for at least 8 hours a day). And the weird part is that many found our work interesting (we were yet to generate results)…so they told other Americans and Canadians, and –by word-of-mouth- many more came and we began to enjoy their company (bivalves are good natured creatures, but not very talkative) and one thing lead to another: quite unexpectedly we started giving “5 minute tours”, explaining what we wanted to do and how we were going to “Revive Mexico’s Pearling Industry”. But, you cannot seriously expect such a small thing to become a “Major Touristic Attraction”. Another ingredient was yet needed…

 The Main Course

 In the meantime, there were several major tour companies using the area for its attractions, but mainly focusing on the State of Chihuahua’s Copper Canyon (not really one canyon, but actually 6 series of interconnected canyons that are about 5 times larger than the “Grand Canyon” in the United States), and these companies realized the potential of using Mexico’s Northwestern States to have one huge “Copper Canyon Tour”, that would draw the attention of a larger crowd: it would grow to include the beautiful Colonial Town of El Fuerte in Sinaloa and include the Sea of Cortez at Guaymas-San Carlos, and utilize Chihuahua’s strong-points such as the Canyon at Divisadero, Creel, the city of Chihuahua, the ruins of Paquimé and the Mormon and Mennonite communities in Nuevo Casas Grandes. And their Tour Directors were looking for new attractions…and somehow they heard the story of these naïve researchers that had begun growing pearls in Guaymas, and so came the first “scouts”.

 And the first to come were Sergio Corona and Carlos Gaytán (in those days they worked with Grand Circle Travel, now they work for “A Closer Look Tours”). They met with us, asked about our research and the things we were doing, saw our jewelry (at about that time -1996- we had already produced a line of Mabe pearls in Sterling Silver Jewelry) and they gave us a bit of “coaching” on how to present our pearl farming venture and ourselves to their tourist groups. And that is how this unique link between a group of Pearl Farmers and dozens of thousands of tourists was forged. Just a couple of years later we were included in these companies official brochures, websites and catalogues.

 The Good, the Bad and…the Ugly

 Once we had a good idea of how to promote and offer a Good tour, we took some steps to make it available not only to those travelers enjoying the comfort of a fully guided tour, but to ANY PERSON that wanted to enjoy the same experience. Thus the tour was offered for FREE and people just had to ask for their tour. And it happened: success!!! We were having more and more people daily and we would be inside our “pearl lab” and we would have people knocking on the door, the door would open and a human head would stick inside saying: “Is this the Tour???” Needless to say, we started doing tours over and over…sometimes up to 7 times a day per person, 6 days of the week. Enrique and I started hallucinating: sometimes I would dream I was doing tours in hell, and we would dread the sound of a knock-on-the-door (even when in our homes). We just could not keep up, it was unhealthy. This was the BAD.

 The new strategy was to have just one tour every hour on the hour. This helped a bit, but it still took too much of our time –and concentration- when we were doing the seeding operation; under such conditions we would begin to make more mistakes in our seeded oysters, reducing the amount of pearls we were supposed to produce. A tit for a tat, some may say…but inefficient for us. So we decided to hire some help and have a professional guide (after months of training) to help us with the small tours and this was… a blessing!!! We finally could devote our time to produce beautiful pearls, without the pressure of taking care of every single person that came to our farm. This was the GOOD. And we had many people in this position, some good, some not that good, and some very good. So, using this small place I would like to thank three of the best: Rocío, Karla and Diana. I really miss you gals…

 And just when we thought it was safe to keep touring the pearl farm…we were struck full-force with “Murphy’s Law”. It all began in early 2009 when our country –Mexico- was struck with the “Swine Flu Virus” or AH1N1, and this event paralyzed the country and scared many of the tourists away. It took months to see a small recovery in the number of visitors…and then we were once more hit by a pair of unbeatable foes: the World Economic Crisis –that begun in the United States in 2008 and affected the entire planet- and we shall not forget “Mexico’s Drug War” that has not been truly effective in destroying the drug cartels, but has been incredibly effective in DESTROYING our touristic industry, regardless of the fact that the State of Sonora is considered as a “Safe State” or that our National Homicide Ratio is smaller than those of many other countries, but I’m not really going into detail with statistics, I’m just going to lay it down the way it is: we lost 80% of our visitors in 2009 and the trend continued in 2010. This is definitively THE UGLY.

The New Situation

Yes, we continue to have tours thanks to many brave Canadians and Americans that are not fearful of the machine guns, grenades and killings that take place…in Afghanistan, Iraq and Libya. It is quite peaceful down here, regardless of the news. The cruise ships have kept coming into Guaymas (we’ve got 6 this year) and we still have one important tour company coming in with busloads of tourists: A Closer Look Tours.

But, the reality is that we have had to downsize and we began enjoying the Bad again and we cannot take the beating: we have a pearl farm to run and operate. So, we have once more had to focus our efforts and have introduced a minor change to our “Pearl Farm Tour”, in effect since March 28^th of 2011:

1. Weekdays (Mon-Fri): Guided Tours from 9 am to 2 p.m. One Tour every hour on the hour.
2. Weekends: Saturdays the Tours are from 9 to 11 am (also on the hour). Sundays we are CLOSED.
3. Tour Rates are $2 USD per person (children under 5 do not pay).

 At any rate, if you purchase your Pearl Tour and you decide to purchase an item at the Pearl Store, you will be able to redeem this amount off your purchase.

So, our apologies to all: we kept our Pearl Farm Tour fully FREE for ONLY 15 years, but now we hope to have 15 more years to offer you a great, educational and entertaining Tour on the new schedule. I hope you didn’t find this Blog entry to be too lengthy or perhaps a bit boring…it has not been boring for me to share this abridged story to you:  it has been a quite a journey –still in the making- for us and it was worth telling it.

So, to sum it up: if you do have the chance to visit our Pearl Farm please do so. If you haven’t been here in a while take the time to bring some friends over, if you have never been here…what are you waiting for?!?!?

Until next time… 

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On December, 2010, we had an unexpected visitor to our farm: Richard D. Fisher, author of some of my favorite books about Mexico’s Copper Canyon and the Sea of Cortez, such as: “National Parks of Northwest Mexico”, and his latest “Copper Canyon: Chihuahua, Mexico”. Not only is the information on the books interesting and quite accurate, but they also have valuable historical, geological and ethnographic information and EXCELLENT PHOTOS. So, you may imagine my surprise when I met Richard in a Bus Tour group from our friends at “A Closer Look Tours”…I was honored to take the whole group to a complete tour of our pearl farm and –as usual- answer our visitor’s questions regarding the subject of pearls (one of these days I will write a Blog-post with the most common and interesting questions we’ve been asked), and guess who asked one of the “best questions” we’ve been asked over the years? Yes, it was Richard D. Fisher indeed, and the question was: “Did the Japanese really Poison the Sea of Cortez’s Pearl Beds in the 1940’s???”

Let us ponder on this story, so let us go back to the early years of the 20^th Century…

From 1900 to 1920:

In those days, the Mexican Pearl Fisheries were still quite active throughout the Gulf of California, but mainly around the Southern tip of the Lower California peninsula (Baja California Sur), with La Paz acting as the main pearl trade-hub. Skin divers were still very much active in the fisheries, but after several hundreds of years of “pearling”, the pearl beds had become less plentiful, thus a new breed of diver was needed: the Helmeted Diver. And these were few in numbers but could work for hours and could go deeper than the typical skin diver, thus it was possible to find larger –older- oysters in deeper waters and fetch some larger pearls.

At the same moment, Dr. Gastón Vivés had his farm up and running quite successfully until 1914 when it was destroyed by the “Constitutionalist Army” during the Mexican Revolution. And from this moment on, the only pearls that could be obtained from these waters were the 100% natural pearls from wild-caught oysters (as opposed to the natural pearls from farm-raised oysters from Dr. Vivés’ black lip farm). And you may imagine that during a civil war people become even more impoverished and will have to resort to sacking their most valuable natural resources in order to obtain funds to sustain them…and this is what probably happened to the pearl beds in the area once the “Pearling Companies” (mostly Mexican, but some even from Great Britain and other parts of Europe) stopped their operations during and after the Revolution.

From 1921 to 1940:

This is a particularly bleak period for the pearl fisheries. The beds on the Baja California side had become commercially exhausted (meaning: no sense in fishing them anymore), but had time to “revive” on the mainland side (mainly in Sonora and Sinaloa). A couple of areas were particularly good “placeres” (name given to places were a given resource is abundant): the waters in front of Caborca and those around “Isla Tiburón”, were the fishery was conducted by the Seri Indian Nation. But in any case, the pearls were on the brink of becoming a legend…then, complete disaster struck the area: in 1939 a “mysterious disease” was traveling from the northern part of the Gulf of California, moving southwards and killing every single black lipped pearl oyster, leaving just empty shells which were identified by the local fishermen due to their silvery shine…

By 1940 the few remaining pearl beds in the Gulf had been decimated and the Cortez Pearl became the newest addition to the vast collection of Mexican fables, stories, myths and legends.

The Japanese Conspiracy Theory

In the late 1930’s most Mexican people were not really thinking of the future “space race” nor with “little green men” and had little interest in such “conspiracy theories”…but this does not mean that our fishermen lacked from imagination nor ideas. They actually began to wonder what some boats with “rising sun” flags and men from a different language and race were doing inside their Gulf…and these men seemed quite suspicious: they anchored here and dropped little devices into the water, retrieved them and then moved to another spot and repeated the process and, yet, they never seemed to fish anything! Also, instead of the friendly exchange of products (cigars, gas, bait, etc.) that they seemed to enjoy with other fishermen –regardless of nationality- these guys were overly serious and would not trade a thing!!! They must be up to some mischief indeed!!!

Back in 1939, many Mexican fishermen still remembered the importance of their pearl fisheries and considered the local pearl oysters as a useful food & shell resource that might reward them with a very valuable gem…if they were truly lucky. Some people had heard that the Japanese had begun producing cultured pearls and that they seemed to be unparalleled in their ability to produce them; still, many believed that cultured pearls were no match to the “real thing” (the natural pearl) and that Mexico would once again become a major league player in the World’s pearl markets.

So, add ingredient #1 (the presence of “tricksy” Japanese in the Gulf) and ingredient #2 (the Return of the Mexican Pearl) and you basically have created a plot, a Japanese conspiracy to POISON the Sea of Cortez and destroy any possible rival for the Japanese Cultured Pearl: the Japanese vessels were dropping poison into the pearl beds to kill their opponent before it had a chance to get back on its feet. And you wouldn’t believe how many people heard of this plot, and how many talk about it as a certifiable truth: people from Guaymas, from La Paz, from Hermosillo, from Mexico City…everyone!

Now, is there any truth in this plot? Could the Japanese have really killed off the pearl beds?

The Facts and the Myths

It is a fact that many Japanese vessels with Japanese men were in the Sea of Cortez in the late 1930’s, and they were definitively up to something, but it is highly unlikely they were sent on a mission to kill pearl oysters. Why? Because with the technology available in those days it is very unlikely they could have possessed a toxin or poison made specially to kill pearl oysters…any other poison must have killed other creatures as well: all sorts of clams, snails and maybe even fish that the fishermen would have noticed. But no it did not. Even today (2011) I am not aware of a toxin that will only kill pearl oysters…and I hope it is never invented!

So, what were the Japanese doing here if not killing oysters?!?! Well, check your timeline and you will notice that the “Pacific War” officially begun in December 17^th, 1941 and Japan went into war with the United States of America, Mexico’s northern neighbor. So, could it be possible that the Japanese were taking depth measurements of areas in the Sea of Cortez??? Could they possibly have planned an attack into U.S. soil from Mexico in order to avoid the heavily defended California coast??? It does sound as a possibility…doesn’t it? Unfourtunately I don’t have any information on this subject…so let us hope that Wikileaks will produce these in a couple of years.

What caused the Mass Mortalities???

This is also an interesting subject. The “official” explanation given by the Mexican Government was that it had been caused by an unknown epidemic (epizootic disease), but they never gave any scientific proof to the fact or they just wanted an easy explanation to what seemed to be a lost cause, because from that moment on (1939) the Pearl Fishery was considered officially closed and a fishing ban was imposed on the capture or fishery of the Mexican Black Lipped Pearl Oyster (Pinctada mazatlanica).

But there were other interesting things happening at the same time, such as…the operation of the United States’ great “Hoover Dam”. Let me place a quote from Wikipedia’s here to further explain:

Environmental impact

The changes in water use caused by Hoover Dam’s construction has had a large impact on the Colorado River Delta. The construction of the dam has been credited as causing the decline of this estuarine ecosystem.^[98] For six years, after the construction of the dam and while Lake Mead filled, virtually no water reached the mouth of the river.^[99] The delta’s estuary, which once had a freshwater-saltwater mixing zone stretching 40 miles (64 km) south of the river’s mouth, was turned into an inverse estuary where the level of salinity was higher close to the river’s mouth.^[100]

The Colorado River had experienced natural flooding before the construction of the Hoover Dam. The dam eliminated the natural flooding, which imperiled many species adapted to the flooding, including both plants and animals.^[101] The construction of the dam decimated the populations of native fish in the river downstream from the dam.^[102] Four species of fish native to the Colorado River, the Bonytail chub, Colorado pikeminnow, Humpback chub, and Razorback sucker, are currently listed as endangered.^[103][104]

If “Hoover Dam” began operating in 1936 and it is known that 6 years later (1942) there was no more fresh-water flowing unto the Gulf of California, then we can begin to imagine the environmental consequences. The “Colorado River” had its waters discharging into the Gulf for millions of years and then…kaput! No more water for you! So, what are the possible consequences: the impact was felt almost immediately on the Gulf’s northern region and its wetlands, but the effect had to creep down as the lack of freshwater made the Gulf of California “saltier” (the “average” salinity of the world’s ocean is 3.5%, with that of the Sea of Cortez being almost 3.6%) and a higher salinity level usually means less dissolved oxygen (which marine animals will use to breathe from the water). Besides this fact we can imagine that many other substances came with the river’s waters, including silt and many minerals…all these possibly very important to sustain a variety of marine plants and microscopic algae, creatures that are considered the basis of most marine ecosystems.

You may say “but the river’s water stopped flowing in 1942 and the oysters died in 1939!!!”, and yes…that is a fact, but the fact remains that there was less water available each year since the dam’s inauguration and by 1939 this was already causing havoc on our local ecosystems.

Conclusion

Have we finally pinpointed the truth to this dire plot or conspiracy theory? Not at all. I believe that there is still much to be done to reach this point, but a possibility would be that we could have indeed had a negative effect from “Hoover Dam” and this combined with the overfishing of the pearl beds and maybe we even had an epidemic or –just to make matters worse- an unknown environmental change. In any case: the Japanese are not to blame. They did not poison the Sea of Cortez to kill off a potential commercial threat.

I would also like to point out that I am in no way now blaming the American people for this disaster (we played our own part in this tragedy), and in those days (1930’s) few people knew or cared or understood how significant something like this truly was. Even now, few Nations are willing to consider Nature as a “User” of a given natural resource. In the meantime, we might speculate that our pearl oysters have had time to adapt to their “new” environment and –if given the opportunity- they will be able to repopulate our waters once more.

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Here we are back again with this topic that I find increasingly interesting, due in part because I have used it as a form of catharsis, allowing me to remember one of the reasons why we started a Pearl Aquaculture project -some 17 years ago- when we were still students at the Guaymas Campus of the Tec de Monterrey. In those days, we first wanted to understand the reasons or logic surrounding the origin of natural pearls and how they are created within the pearl oysters and -of course- there was this previous “knowledge” about the origin of pearls: the mystical, magical, whimsical and musical “grain of sand theory“, which is really just another “pearl myth”.

Another Myth that Afflicts Humanity

It seems that regardless of the time period or place, this sand-grain-to-pearl myth has become very popular: it can be heard almost in any country and language. In my case my grandmother told me, when I was just a child, that pearls grew in an oyster as a result of an irritation caused by a grain of sand, so that there was no better choice for the little animal than to coat the painful and offensive particle with soft layers of nacre. I, of course, assimilated this important information and used it wherever there was an opportunity  –and there were not many I must admit- until it came time to put this theory to the test.

Previous Experiments

From Left to Right: Manue, Enrique & Douglas

Back in 1991, our select group of friends – including Mauricio Atl Tahuilan, Carlos Navarro Serment and Jesús Gutiérrez – had helped us to collect some 70 Pearl oysters to start off our studies on Pearl oyster reproduction and culture. Most of the oysters collected were “Black Lips” (Pinctada mazatlanica) and only a few specimens were “Rainbow Lips” (Pteria sterna), so we use some of these few animals for a very simple experiment: use sand to produce natural pearls. And the result was simply disappointing: we did not obtain a single Pearl. Zero. Zilch. Nothing. Nada. And there arose the question of why didn’t it work? Because we all know that a grain of sand will induce the production of a pearl…thus, a thousand grains of sand should be capable of allowing for the production of a thousand pearls and a million grains of sand …well, a million pearls!!! It was just so obvious and foolproof.

But it was not. As much sand as we used, we could not produce pearls. Not a single one. On the other hand, when we took a peek inside our oysters we noticed that the oysters were perfectly clean, without a trace of sand. We could not know -for real- what really happened in those days because we simply did not have the time to sit there -in front of an oyster- for some 24 straight hours. Can you imagine yourself sitting, just watching an animal that -for some people- is as interesting as a rock??? Therefore, we came up with conjectures and hypotheses, but we never quite knew what was truly happening; anyway, we were “satisfied” with our guesses. Many years have passed now since those days, and the technology to help us is now available –and is also inexpensive- to perform these small experiments…and, of course, for the “birth” of this Blog to have the motivation to write and document the experiments.

Experimenting with sand: the Present

We used a small fish tank with clean seawater to introduce two “Rainbow Lipped oysters” into which we had –previously- introduce one and a half tablespoons of sand. We placed a small video camera to take a time-lapse video for the next 18 hours to record what happens to an oyster which has sand inside. The results did not astonish us, and lived up to our expectations.

The Results

After 3 hours in the tank, oysters would quickly open and close their valves, in a movement and launched a “cloud” of sand out of their bodies. This action removed a great proportion of sand from their bodies, but for the next 8 hours the oysters continued to, slowly, releases small “sand packets”. These “sand packets” consist of a sticky mucus that the oyster secretes in order to “bind” or adhere the sand, and thus it is more easy for them to remove the annoying particles. By next morning, the oysters were almost perfectly clean.

While – at first view – the oysters seemed to be clean from sand (we could see the most of the sand laying at the bottom of the tank) an oyster was sacrificed in order to inspect its body thoroughly, and we still managed to find a very small amount of sand inside. Under natural conditions, the oyster would have managed to remove all remaining sand in some additional hours, but here it was necessary to see the “mucus in action”: our video displays how the Oyster uses its mucus to catch some sand particles and helps to eliminate them.

Conclusions

Pearl oysters are perfectly adapted to their natural environment – the ocean – which has an inexhaustible source of sand. Because of this perfect adaptation, these lowly creatures can – very easily – remove every single annoying grain of sand from their bodies; thus, we can discard sand as being able to help produce natural pearls. In my opinion this is highly unlikely.

Thus, we hope that with the information generated by this test and the proofs on video we will help –once and for all- eliminate the false myth of the “grain of sand”. We hope that this myth will not become resurrected –a zombie of its former self- and come back to haunt us in the future… I swear that if I have to listen –once more- the question of “Is it not a grain of sand that makes the pearl?” something very, very bad, will happen …. I’m just joking: I have already been seared in the flesh –and mind and soul- with this question for years and years, so I am certain I will be able to sustain it longer (but try not to put me to the test, please).

A Blister Pearl!

While inspecting the oyster that was sacrificed for the “grain of sand experiment” I found a worm-like mud-blister pearl. Since our last blog-episode was about these pearls, and I already had the camera rigged it was just natural to make this information available for you all. So, I simply used a scalpel to break the mother-of-pearl layer on this “small tunnel” and found a small orange colored worm. It was clearly a drill-worm (genus Polydora). This discovery can be seen in the video as well.

Coming soon

This Blog will continue to have more information of interest to you, but probably this information will become a little more “spaced” in time, since our farming activities become intensified during the winter season and we usually spend more time at the farm than at the office (where I write the Blog).

So please do not despair, I promise more posts in the near future and do continue to visit our Blog and send your comments and suggestions.

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Here we are once more with the intention of sharing information about these beautiful marine gems.  On this occasion will continue with the subject of natural pearls and specifically about how these gems are created in nature.

During the era scientific enlightenment in the late 1800′s, scientists from all over the world were searching to understand how pearl oysters were able of producing pearls, and their discoveries were fascinating.  But some of the first things they discovered at to do with the internal structure of the pearl, since in order to obtain the truth it was necessary to cut open pearls and inspect their core.  And what they found is that pearls are very much like onions, at least structurally.

When an onion is cut in half what we see inside are numerous concentric layers, each stacked on the previous one, and in a similar manner pearls are produced: the original seed that caused the pearl to originate will be found at its core, surrounded by millions of micron thin layers of Aragonite.  Perhaps this is a reason why the ancient Greeks gave the name “Margarita” to the pearl, since this is also the word for “onion” (hence the name “Margaritifera” that was given in early times to many pearl producing mollusks, meaning “pearl bearer”) in that language.

The Inner structure of an Onion (left) and a Natural Pearl (right).

In the above images of an onion and a natural pearl (both cut-in-half) we can see their internal resemblance, and going further into the deeper core we can also appreciate how their core is not round, but with each additional coating of nacre (in the case of the pearl) the shape becomes rounder, softer, although most natural pearls I have personally seen are rarely 100% round, most being baroque and a good proportion of them being semi-baroque in shape (mainly in the shape of buttons, bullets and drops).

But of course we do have several types of natural pearls.  Many don’t look like the image that we have in our brains as being a pearl, but they are nonetheless pearls.  We basically have two major groups of natural pearls: blisters and loose pearls.  Of these two groups we would have subgroups as well.  Let us begin with the pearls that could be considered the most common.

Blister pearls

Perhaps some of the most common natural pearls are those usually referred as blister pearls in English, “ampollas” in Spanish or as “ampulles” in French, and we could even say that these laid the foundation for the eventual production of mabé pearls (also known as blister or half pearls).  These pearls are commonly found formed on the pearl oyster’s shell, as a response from a very active “Bio-terrorist” (usually an animal that actively drills through the oyster’s shell).  The reasons for this active attack on the oyster’s shell are varied and depend on the species that attacks the oyster, blister pearls being the result of the oyster’s defense mechanism against these intruders.

The varieties of organisms that “attack” the oyster’s shell are huge and include animals such as sponges, polychaete worms and drill mussels.  Many of these creatures are not really after the oysters flesh, meaning there not there to actually eat the oyster but that they are actually just looking for a “home” and have been known as “domiciliares” because they usually make their homes inside the oyster’s shell and -unfortunately for the pearl oyster-these actually weaken the shell, making it really brittle and easy to break.  Of course, these “Bioterrorists” will also come in direct contact with the oyster’s flesh and this interaction will almost certainly produce blister pearls.

There’s a variety of sponge known as, usually colored with a bright orange red or yellow with a sticky consistency, which grows on a large variety of shellfish here in the Sea of Cortez, and it seems to have a preference for the black-lipped pearl oyster (Pinctada mazatlanica).  It can cause small lump like blisters, but I have never seen any pretty specimen of pearl caused by this sponge.

Another creature capable of causing blister pearls is the infamous drill mussel or pholids.  These creatures –and here I also have to include the Cliona sponge- are actually filter feeders just like pearl oysters are, so we can be sure that they don’t attack the shell to eat the oyster’s flesh, but they have brittle shells so they need the protection of a hard substance around them.  These little creatures can actually bore stone, wood as well as sea shells.  We have seen numerous blister pearls formed by the attack of these agents, as well as in one loose pearl.  These creatures also have a preference for black-lipped pearl oysters, but may occasionally attack older individuals of the rainbow lipped pearl oyster variety (Pteria sterna).

The group of organisms which we find more interesting in the case of pearl formation of the polychaete worms, mainly those of genus Polydora: slender worms usually with a bright red coloration.  These worms have the capacity to infest pearl oysters to the point of weakening them and causing their death and in the process making the oyster produce numerous “mud blisters”, which may eventually become coated with nacre.

Shell Damage caused by Drill worms and Drill Mussels

Mud Blisters

We have examined several varieties of the so-called mud blisters and in most instances where we have found are the remains of dead drill worms, as well as good quantities of very organic mud.  It would be difficult to fully identify what causes this variety of blister pearl, but I believe that it is safe to say that it is a combination of the worm´s drilling activity and the entrance of mud due to the disappearance of the drill worm.  What caused the drill worm to disappear?  Well, we have also seen large numbers of predatory polychaete worms on the oyster’s shell and these may very well go after the drill worms and kill them, leaving their home vacated.

When removing a mud blister and cutting it in half we usually find a protective coating of protein secreted by the pearl oyster that that helps to coat the organic mud and that is in turn coated with nacre.

Unusual blister pearls

Some very unusual specimens have been found that include other varieties of animals as the cause, these include fish and crustaceans.  Perhaps the most interesting specimen is that of a small fish that was found in the shell of a Mexican black lip pearl oyster that was fished in Baja California during the last days of the 19^th century (this specimen is still kept in the American museum of natural history in New York).  The fish was identified as a “pearl fish” (family Carapidae), which are usually associated with many species of clams and oysters and sea cucumbers (please use this link if you want to see an animated diagram of a pearl fish, if you’re a proctologist you will enjoy this).  And although we have seen these fish inside oysters we have never had the fantastic opportunity of finding a “fish pearl”.

Pearl fish are not parasitic but instead they find shelter within the oyster’s shells.  I believe most oysters would not be offended by the presence of this little fish, but in this particular case may be the little fish died and the oyster preceded to rapidly coat it with pearl or nacre, I don’t believe this could’ve ever happen with a live fish.

Other possible sources for blister pearls

Other organisms that could be turned into pearls -but that I have never seen turned into pearls- are the little shrimp and crabs that are found inside pearl oysters.  The little translucent “pearl shrimp” are also found in many other species of clams, such as pen shells, and are typically found within the large Pinctada oysters. The species we find in the Sea of Cortez is Pontonia margarita, and we can usually find two individuals within an oyster (one male and one female, the male usually being the smaller of the two), this species does not seem to affect the pearl oyster.

Another type of crustacean we have seen inhabiting the oyster’s body is the “pea crab”; these little crabs are somewhat soft and quite clumsy, no wonder they need the protection they find inside an oyster’s shell.  These little crabs have only been reported as found living inside the Australian silver lip pearl oyster (Pinctada maxima), but the Sea of Cortez has a variety that is only found within the rainbow lipped pearl oyster (Pteria sterna) and this will be the first time this will be reported in writing.  The name of this species is still unknown (Pinnotheres sp.) and we usually only find one inside an oyster.  We have seen some crabs causing a disturbance within the oyster that could eventually lead to the production of blister pearls, but we have yet to find a “crab pearl”.

So, what do you think about all the life-forms that depend or use a pearl oyster -in a way or another- for their survival? Life is indeed a web, and if you can save one species you will be offering an “umbrella” of protection for many others…

In our next chapter will continue talking about natural pearls and their possible origins, in the meantime I will continue hunting for additional facts and -of course- searching for more mythical pearls: I can clearly see myself wearing a pea crab pearl pendant.

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This is a subject that we wanted to discuss since quite some time ago, but instead we have been discussing various topics in order to be able to capture the attention of as many readers as possible, especially since talking and educating about pearls is somewhat complex and requires greater intention. So far, despite the fact that we have already talked about “Pearl culture” and “natural pearls” -such as those once produced by Don Gaston Vivés in Baja California-  (see our entries on this topic) there are still many people who are confused or who have received incorrect information on the subject. We have found that on Spanish language sites –by the way: this Blog is primarily for Spanish language readers, but we do some effort to have an English version in order to be a bit more “universal” -there is from none to very little information on the subject of natural pearls in Spanish on the web, but in English this is not the case (some very good sites on the subject are: Kari pearls and Love to Know 1911), but you can never have enough information, so here we will try to answer all questions or -at the least– will help you to find new questions (not a bad thing per se).

So let us start this fascinating topic of natural pearls. First, we’ll start with a bit of history, we then will examine certain features of pearls and finally talk about how the natural pearls are formed and we do hope we can help to do away with the incredibly popular myth of “pearls are formed with a grain of sand”… I’ll try my best.

History of the discovery of the Pearl

Who discovered the first pearls? When did people begin to show an appreciation for pearls? What are we having for Lunch today? These are probably the questions that many have pondered upon for ages and for which we do not have a fulfilling answer, but let us “travel back in time” to about 10 thousand years ago (and even before that), when human groups in coastal areas or even in areas with rivers began to swim in search of food (notice the importance of question #3?) and under the philosophy of “everything that can be eaten must be eaten” they began to collect pearl oysters and mussels for lunch. Occasionally, they would find a Pearl inside and this could either become a happy moment or a time of huge annoyance… since one hard bite on a pearl can easily cause a dental crack. But let us suppose they did happen to find a “little pearl”: perfect, beautiful like the Moon, or as green as the sea, or able to display rainbow-like flashes or they were able of seeing their face reflected on it… to our ancestors this was Pure Magic. Let’s say that it could have been a good start for the discovery of the Aesthetics.

Now, how did that appreciation and admiration for these small nacreous orbs became an item used as a gem or for personal adornment? Most likely human beings were already using varied “ornaments”: shells, wood, leather, teeth, bones, stones… (it is stated that the oldest pieces of jewelry found are about 100 thousand years old and were made using snail shells, for more information click here) but the Pearl would become the highlight among any other decorative items because it was much more beautiful and would arrive in an “almost ready” state for its use: while almost all other items (corals, gemstones, ivory, etc.) would require many work-hours in order to end up used in an ornament. But the Pearl was a truly a gift of Nature… and had a value-added feature that today is not easily appreciated: its hardness (this topic will be discussed in a future blog delivery).

Adornments similar to those used by our Human Ancestors

Once the Pearl became more and more popular in the taste of our ancestors it also became a “sacred” or “holy” gem, thus many legends and stories about pearls exist and there is not a sacred book that does not include our beloved Gem within its pages, and this also generated many theories about its formation: that its origin it was purely divine, that when angels shed tears these would fall into the sea and became pearls, or that when lightning struck the surface of the ocean pearls would be formed and would fall into the oyster’s gaping mouths (the lightning being produced by the Greek god Zeus), etc., and these ideas eventually evolved up to the this point in civilization  until we  finally arrived to the widely accepted idea that “a grain of sand enters the oyster’s body and irritates the animal unless it coats it up with nacre and thus…becomes Pearl”. How did we ever get this idea? Let us look into this account more closely.

The theory of the Grain of Sand

What is interesting about this idea is that most people consider it as a very logical and sound theory, and so it must be true. Let us analyze this “theory”, step by step:

1. Pearl oysters live in the sea, in shallow coastal areas and are found attached on hard substrate (rocks, reefs, shells of mollusks, etc.), and in these areas there is enough sand for the purpose of “stuffing” the pearl oysters.
2. It is logical to imagine that in a day with appropriate environmental conditions (waves, wind, strong currents) some sand will become suspended in the water and could travel –using sea currents- until some grains of sand find their way into an open oyster.
3. At this point, the oyster is starting to feel irritation from the roughness from the grain of sand and -as a consequence- the oyster will have to defend itself from this “painful foreign body” by secreting a smooth and delicate substance –nacre- around the grain of sand in order to form a soft and delicate pearl… easy, isn’t it?

A "Panamic Black Lipped Pearl Oyster" (Pinctada mazatlanica)

But I am sorry to say that this is not the case and I’ll be emphatic and will just say NO NO and NO!!!! That is simply not true nor accurate. And in fact, we have reliable and accurate scientific information about what actually happens to an Oyster in order for it to produce a Natural Pearl… but for some unknown reason –could it have been a marketing scam? –”the grain of sand theory” is the one that won and it ended up established in the collective conscience of humanity. How can we prove this theory as incorrect?  We have two tools: the first would be using logic and the second one by means of experimentation. Let’s do this step by step.

Using logic

Natural pearls were almost always scarce. Most sources mention obtaining only ONE (1) natural pearl from every 10 thousand slaughtered oysters. One Pearl for every 10 thousand little animals…. But how much sand do we have available at sea? Why so many grains of sand reaching so very few pearl oysters? How come we can’t find many more pearls?

In our experience -from what we have seen by working for over 18 years here in Bacochibampo Bay-  is that water conditions can be severely affected by a change in tides, a swell or due to tropical storms, or even due to strong Northwest winds, and the change can be so severe that sea-water conditions can change from its normal blue-green color to a “caffé latté” (brown) color due to the immense amount of suspended -containing large quantities of sand and mud- sediments. At times like these, the amount of pearls which should be formed definitively has to be huge, simply because of the potential “sand-grains” in the waters. Now, this kind of phenomenon is not uncommon: it happens very often in our location, especially during winter months. That means that any Pearl Oyster in the Bay might receive from just several thousand to millions of grains of sand per week; and keep in mind that if an Oyster can live about between 6 to 16 potential years…this rises to the amount to that of billions of grains of sand = billions of pearls PER OYSTER.

Thus each pearl oyster should be the equivalent of a treasure chest: it is simply a question of diving for one Pearl Oyster in order to obtain sufficient pearls for several necklaces, bracelets, earrings and gift-sets for the whole family and –why not?- even for the pesky neighbors!!! …but, again, this is not the case: only one of every 10 thousand oysters produces a quality Pearl.

If the cause is not sand… then, what causes a natural pearl to form? We’ll talk about this in our next blog delivery…

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We want to share with you the experience of having achieved the production of two unique -exceptional- pearl necklaces made from pearls produced at our farm in Bay Bacochibampo, Guaymas, Sonora, Mexico.

Both necklaces –one made of loose cultured pearls and the other from keshi pearls- are made using pearls produced by the native Pearl Oyster known locally as “Concha Nácar”, also known as the “Rainbow-lip Pearl Oyster” or by its scientific name Pteria sterna. If you have checked any world pearl production data, you will find that this is the only commercial farm in the world that employs a pearl oyster of the genus Pteria. So, all other pearl farms of the world use the so-called “mother-of-pearl oysters”, which belong to genus Pinctada. Thus, simply because of their rarity, a necklace made of pearls from the “Rainbow-lip Pearl Oyster” is really a very special piece, completely out of the ordinary.

Finally, we could talk with technicalities about the beauty of these pearls… that their Orient or overtones are exceptional, that their chroma or color saturation is simply out of the ordinary, that their natural luster is very high, but I think that anything that is said about these two necklaces simply PALES before what we can capture with our eyes… so we offer some beautiful pictures of these items, and you… you will be the one to decide whether they are beautiful and exceptional pieces.

“Bacochibampo” Pearl Necklace

Bacochibampo Pearl Necklace

Previously known as the “Bicentennial” necklace, but once it passed into the hands of its new owners it received it’s new – and very proper- name: Bacochibampo. This is a word which means “Bay of the Seven-headed Snake” and refers to an ancient Yaqui legend (of which we will talk in the future). It is also the name of the beautiful Bay in which we culture these pearls, thus we found its name to be more than appropriate.

This necklace consists of 41 cultured pearls, but if you recall (see this note) the necklace originally had 43 pearls, but the “missing pearls” were used to make a beautiful pair of earrings to go with this incredible piece.

Additionally, it gives great pleasure to say that this necklace found its residence in Mexico, adding to the number of Cortez pearl necklaces in Mexico to 4 (1 more needed to equal the number of necklaces found in other countries).

“Mares Lucis” Necklace

Keshi Pearl Necklace Mares lucis

Whose name evokes the natural phosphorescence which we enjoy in a warm and dark summer night. This is our first great necklace but made with Keshi pearls. It was made at the request of a client in the US and it turned out to be a very pleasant task.

This necklace has 61 Keshi pearls harvested between the years 2007, 2008, 2009 and 2010. It is a graduated necklace, which means that the size of the pearls gradually decreases from the Central Pearl – of greater size – towards the rear. The sizes of the keshis vary between 3.9 and 6.7 (central) mm.

Mares lucis -another view

It was truly a privilege to work in the production of these unique pieces of jewelry. These are durable pieces that are meant to become true family heirlooms. For us the making of these necklaces meant:

1. That we took care of at least four different generations of pearl oysters (2005-2008), each one being looked after for a period of 4 years (this means 12 years of care, work and dedication).

2. The operation of thousands of pearl oysters, so that of these thousands only 1% would give us enough Gem quality pearls, in the sizes and shapes required for the production of these jewelry items.

3. A selection process that involves saving the best pearls from each year’s harvest, so we can have the pearls needed to produce one pearl necklace of this quality, every year.

So when they ask us if we cannot simply make another necklace like these we have to say: “We’d Wish!”… And hopefully next year we also have the opportunity and privilege to produce another necklace like these two… never identical, always unique, but of this same Quality.

The only that remains for me to do is to invite you to watch a short video with additional photos of the “Bacochibampo” pearl necklace…

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