Pearl Education

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yakkah: Historical Persian quality factor describing natural pearls of secondary quality.

yellow grains: Nineteenth century theory of natural pearl production stating that yellow grains found in some freshwater pearls were from shell-production reserve material. This organic material made its way into the mantle and catalyzed pearl growth.

yoyo: Japanese term for a host mollusk's 45-day...

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Zebra mussel: Introduced Asian mussel species that has done significant damage to freshwater mussel stocks in streams and rivers principally north of the Ohio River in the eastern United States.

Zuchtperlen: German term for cultured pearls.

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CIBJO (2006): The Pearl Book. Milan, Italy.
CIBJO (2021). Guide for Classifying Natural Pearls and Cultured Pearls.
Donkin, R. A. (1998): Beyond Price. Pearls and Pearl-Fishing: Origins to the Age of Discoveries. American Philosophical Society, Philadelphia.
Fiske D., Shepherd J. (2007): Continuity and change in Chinese freshwater pearl culture. Gems & Gemology, Vol. 43, No. 2, pp. 138-145...

The Latest Pearl News of the Pearl World

Pearl-Guide.com makes breaking news of the industry available as it happens without a hint of subtlety. Only articles with sincere value and of great interest to the pearl community will be found here.

Recent Articles from Pearl-Guide.com:

New Bi-Monthly Column: The Sustainability Corner
The Winners! The CPAA's 10th Annual International Pearl Design Competition (IPDC)
A review: The History of Pearls in the Gulf of California, Mexico -...

Pearl World Journal
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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 interested in pearls, worldwide...

Cortez Pearls Defined
Cortez pearls are pearls grown in the "Rainbow Lipped Pearl Oyster" or Pteria sterna from the waters of the Gulf of California -or Sea of Cortez- in Mexico.

The History and Comeback of Cortez Pearls
Emerging once more from the clear waters of the Gulf of California, after decades of protection, is Mexico's most emblematic gem: New World Black Pearls.
In 1533, the Spanish Conqueror Cortez sent the very first expeditions into the area to find the mythical Sea of Pearls...