February 25-26: VALLEJO, CALIFORNIA: Annual show; Vallejo Gem and Mineral Society; Solano County Fairgrounds
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 Post subject: CIBJO's Guide for Natural and Cultured Pearls
PostPosted: Sat Dec 03, 2022 1:22 pm 
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CIBJOs Guide for Classifying Natural and Cultured Pearls
https://www.cibjo.org/wp-content/upload ... -Guide.pdf



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