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Pearl Education

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  • Pearl Treatments

    Pearl Treatments Defined

    Pearl treatments are defined as any action other than polishing which alters a pearl's appearance which may include:
    • irradiation
    • bleaching
    • heating
    • filling
    • waxing
    • drilling
    • cutting
    • faceting and
    • working

    Pearl Treatments just after Harvesting After harvest, most pearls are always processed in one way or another. This processing may be subtle or less so. South Seas, Tahitians and Cortez pearls are usually just washed and will undergo minor ...
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    Last edited by CortezPearls; 03-26-2021, 12:31 AM.

  • Pearl Weight

    Cultured and Natural Pearl Weight Descriptions

    Pearl weight is expressed in carats or grains when describing natural pearls, or kilograms, kan or momme when describing cultured pearls.

    When Is Pearl Weight Used Instead of Size?

    Most of the time, pearls are described primarily in terms of their size (diameter) and expressed in millimeters, such as this pair of akoya pearl earrings. Weight is typically only described within the wholesale trade or when dealing...
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    Last edited by CortezPearls; 03-25-2021, 12:25 AM. Reason: Edited text and added images.

  • South Sea and Tahitian Pearl Grading

    Grading South Sea and Tahitian Pearls

    While there is no internationally recognized number or letter system for pearl grading, there are best-grading practices that are accepted and recognized by all professional pearl dealers within the industry. Understanding grading attributes and quality characteristics of South Sea and Tahitian pearls is imperative to properly shop and compare.

    Pearl Grades Are Combinations Of Many Different Value Factors As pearls have many differ...
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    Last edited by CortezPearls; 03-15-2021, 03:08 PM.

  • Mother-of-Pearl (MOP)

    Mother-of-Pearl Defined

    Mother-of-Pearl (MOP for short) or Nacre (as it is also known) is the iridescent coating on the inside of some mollusk species which is composed of aragonite and calcite, both being calcium carbonate polymorphs. MOP also contains water and binding proteins secreted by the mollusks, the most important being conchiolin. Mother-of-pearl is also the primary material used in pearl nucleus manufacturing. MOP beads are still the most common nucleus (core) used to pro...
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    Last edited by CortezPearls; 03-24-2021, 11:20 PM.

  • Pearl Harvest

    The Pearl Harvest

    The pearl harvest is the pay-off for years of investment and arduous work. The harvest most-often happens during the winter months as the host mollusks' metabolism slows and nacre platelets become thinner as deposition decreases. This has proven to increase the luster upon harvest.

    Pearl Production Times Vary Cultured pearls are harvested from the pearl farms after a period that may stretch from 8 months to 6 years. Akoya pearls are typically c...
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    Last edited by CortezPearls; 03-30-2021, 03:40 PM. Reason: Edited text and added images and videos

  • The Pearl Nucleus

    Pearl Nucleus Defined

    A pearl nucleus is a bead or other object implanted into the gonad of a marine mollusk or into an existing pearl sac in the gonad or mantle of a freshwater mussel around which nacre deposition occurs.

    The Pearl Nucleus and Nucleation/Grafting Pearl farms vary depending on the type of mollusks being produced. But the one thing all pearl farms share is the process of nucleating the mollusks to produce a pearl. Every cultured pearl produ...
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    Last edited by CortezPearls; 03-30-2021, 04:16 PM. Reason: Edited text and added photos

  • Pearl Nucleus Composition

    The Proper Pearl Nucleus

    A pearl nucleus is usually made using freshwater mussel shells that has been cut and ground into a polished, spherical bead. Other nuclei do exist, these have been produced from other marine shells, such as from the large black and silver-lipped pearl oysters and from Bironite TM.

    Nacre Deposition will occur over any Solid Object An oyster's "pearl sac" will secrete nacre over nearly any solid object. This has led to countless attempts to nucleate...
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    Last edited by CortezPearls; 03-24-2021, 11:56 PM. Reason: Edited and improved text, added images.

  • Pearl Nucleus Manufacturing

    Manufacturing the Pearl Nucleus

    A pearl nucleus is manufactured from freshwater mussel shell which has been worked into a perfect sphere and polished.

    The Nucleus is an Essential part of Perliculture The nucleus of a pearl, although it is not typically visible in a harvested pearl, is extremely important in the culturing process. The nucleus is the seed that the oyster "impregnates" to create and produce the cultured pearl. Without high quality nucleus it is impos...
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    Last edited by CortezPearls; 03-30-2021, 04:29 PM. Reason: Edited text and added photos

  • Famous Pearls part 1

    Famous Pearls in History Pearls are among the world's oldest gems, and from the time they were first discovered, they have remained some of the world's most sought-after and most revered gems. Throughout time, there have occasionally been a few pearls discovered that stand out among even these rare gems. Many of these famous pearls, some of them thousands of years old, are still around to be admired today. These pearls are remarkable reminders of the rich pearl history. ...
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    Last edited by CortezPearls; 03-30-2021, 04:57 PM. Reason: Edited text and added photos

  • The History of Pearls

    The 4000 Year History of Pearls

    Pearls have been prized and collected for more than four thousand years, giving them the title of the world's oldest gem.

    The Early History of Pearls Pearls have long been treasured and highly valued in many cultures throughout history. As far back as 2,300 BC, Chinese records indicate that pearls were the prized possessions of (and gifts to) royalty. In India, ancient Hindu texts repeatedly refer to pearls, stating in one place that the go...
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    Last edited by CortezPearls; 03-15-2021, 04:38 PM.
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  • A review: The History of Pearls in the Gulf of California, Mexico Part 3
    by CortezPearls

    It is at this particular crossroad that we find a Mexican-French Medical Doctor by the name of Gastón Vivès, attempting what very none had tried before: initiate a commercially viable, large-scale pearl oyster farm to produce shell and pearls. The Vivès family owned a pearl fishing armada in La Paz, Baja California Sur, and they were experiencing diminishing profits every year, thus wanting to revert this trend we find Gastón Vivès...
    05-08-2021, 05:20 PM
  • A review: The History of Pearls in the Gulf of California, Mexico PART 2
    by CortezPearls
    The arrival of the Iberian Conquerors

    The Native Nations had no real interest in establishing a commercial venture in pearl fishing and we understand little to nothing of the way they fished for pearls, since most of the information was either lost or destroyed during the conquest of Mexico. The rich plunder of the Conquistadores was sent to Spain and later dispersed all over Europe. The most significant information we have on the subject comes from the period of colonization of northwestern...
    04-05-2021, 03:26 PM
  • A review: The History of Pearls in the Gulf of California, Mexico - PART 1
    by CortezPearls
    A review: The History of Pearls in the Gulf of California, Mexico
    By Douglas McLaurin-Moreno

    Since unrecorded time, man has obtained many bounties from the world’s oceans: food, shells, corals, sponges, seaweeds, and the most desirable of all of these were the beautiful mother-pf-pearl shells and their valuable treasure, Pearls.

    Mexico has four species of pearl oysters inhabiting its coasts, two -the larger sized- on the Pacific side: the Panamic Black Lip...
    03-18-2021, 03:04 PM
  • About
    by Kevin Canning
    More than 10,000 Members Strong
    Founded in 2003 with the addition of a community forum in 2004, is a friendly group of pearl dealers, farmers, traders, wholesalers, hobbyists, authors, and consumers. With members from around the world engaged in daily conversation, is the largest community of pearl enthusiasts in the world.

    World's Only Open Pearl Discussion Forum exists for the benefit of consumers and the trade. With the world...
    07-24-2014, 07:33 PM
  • The French Blue
    by WayneCMS
    By Richard Wise I was fortunate enough to get an early Kindle edition of Richard Wise's newest masterpiece The French Blue. I also own a copy of Wise's Secrets of the Gem Trade, and it is one of the very few gem books that I've read cover to cover, not just skipping ahead to the sections about pearls. The French Blue is a completely different kind of work. It is a novel that begs to be read slowly, but once one becomes entranced in the story, it is nearly impossible to put down. Not for the f...
    07-21-2014, 10:36 AM
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    Use of will constitute acceptance of the following policies and rules of conduct. These policies and rules of conduct may change periodically. The forum on is presented "as is" with no w...
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