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CIBJO's Guide for Natural and Cultured Pearls
https://gemologyonline.com/Forum/phpBB2/viewtopic.php?f=70&t=26568
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Author:  Barbra Voltaire, FGG [ Sat Dec 03, 2022 1:22 pm ]
Post subject:  CIBJO's Guide for Natural and Cultured Pearls

CIBJOs Guide for Classifying Natural and Cultured Pearls
https://www.cibjo.org/wp-content/upload ... -Guide.pdf


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