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  • A review: The History of Pearls in the Gulf of California, Mexico PART 2

    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...
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  • A review: The History of Pearls in the Gulf of California, Mexico - PART 1

    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...
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  • Debunking a Widely Held Japanese Myth

    By C. Denis George Abstract by Anna Kerrig

    Historical Aspects on the Early Discovery of the Pearl Cultivating Technique Japanese scientists, Nishikawa and Mise are typically recognized for discovering the technology that led to cultivating spherical pearls. C. Denis George was an Australian enthusiast who challenged the credit given to the Japanese for this discovery. George argues that Nishikawa and Mise's step-father were first exposed to successful pearl cultivation at Thursday...
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    Last edited by CortezPearls; 04-05-2021, 07:26 PM. Reason: Edited spaces and added link to text

  • Natural Pearls

    Natural Pearls Defined

    Natural pearls are calcium carbonate secretions which form within mollusks without human intervention.



    Natural Pearls - Accidents of Nature Natural pearls are formed randomly and really are simple accidents of nature. When a certain type of irritant, such as a parasite, becomes lodged in the tissue of a mollusk, the animal responds by secreting a calcium carbonate substance called nacre to coat the intruder and protect the mollusk...
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    Last edited by CortezPearls; 03-23-2021, 05:42 PM. Reason: Improving text & adding images

  • Saltwater Pearls

    Saltwater Pearls Defined

    A saltwater pearl is a calcium concretion (can be nacreous or non-nacreous) produced by a saltwater mollusk that lives in a saline/marine environment. These pearls can be either natural (no human intervention in its production and a product of a fishing operation) or cultured (produced with human intervention by means of pearl farming).


    Natural Saltwater Pearls Traditionally, most pearls were fished from saltwater-dwelling mollusks in the Pers...
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    Last edited by CortezPearls; 03-23-2021, 06:22 PM. Reason: Improved the article

  • Pearl Quality

    Measuring Pearl Quality

    Pearl quality and thus, the value of a pearl is measured according to a combination of several varied factors are: the type of pearl, the thickness of its nacre, its luster, the cleanliness and texture of its surface, its shape, its color, and its size. Because the pearl is a naturally occurring organic gemstone, created by living creatures, these factors can and do vary widely. Although all of them affect the ultimate value of a given pearl, some of the facto...
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    Last edited by CortezPearls; 03-24-2021, 12:20 AM.

  • 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.

  • 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.

  • 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.

  • 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.
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  • 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 Pearl-Guide.com
    by Kevin Canning
    More than 10,000 Members Strong
    Founded in 2003 with the addition of a community forum in 2004, Pearl-Guide.com is a friendly group of pearl dealers, farmers, traders, wholesalers, hobbyists, authors, and consumers. With members from around the world engaged in daily conversation, Pearl-Guide.com is the largest community of pearl enthusiasts in the world.

    World's Only Open Pearl Discussion Forum Pearl-Guide.com 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
  • Pearl-Guide.com Forum Policies and Rules of Conduct
    by WayneCMS
    Pearl-Guide.com, its owners, moderators and administrators reserve the right to:
    • Remove or move any content for any reason at our sole discretion
    • Modify or edit any content for any reason at our sole discretion
    • Suspend or ban any members for any reason at our sole discretion
    Use of Pearl-Guide.com will constitute acceptance of the following policies and rules of conduct. These policies and rules of conduct may change periodically. The forum on Pearl-Guide.com is presented "as is" with no w...
    07-21-2014, 10:31 AM
  • Pearl World - The Publication
    by WayneCMS
    Pearl World Journal is no longer being Published!

    Pearl World Journal

    Devoted to covering the pearl industry, Pearl World: The International Pearling Journal is the only English language publication of its kind. For 17 years the journal has covered every aspect of the pearling industry, from harvests, production, auctions, wholesaling, and education, to retail designing end consumer marketing.

    The Publication The journal is published solely for those inter...
    07-21-2014, 10:29 AM
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