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 Post subject: DOWNLOAD THE CIBJO BLUE BOOKS FREE OF CHARGE
PostPosted: Tue Apr 14, 2020 11:43 am 
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The CIBJO Blue Books are definitive sets of grading standards and nomenclature for diamonds, coloured gemstones, pearls, coral, precious metals and gemmological laboratories, and also responsible sourcing practices. They are compiled and are consistently updated by the relevant CIBJO Commissions, whose members include representatives of trade organisations and laboratories active in the diamond, coloured gemstone, pearl, precious metals and jewellery industries.

http://www.cibjo.org/introduction-to-the-blue-books-2/


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