Tag: Roland Naftule

CIBJO’s Blue Books Available on its Website

Milan: The six CIBJO Blue Books are definitive sets of grading standards and nomenclature for diamonds, coloured gemstones, pearls, coral, precious metals, and gemmological laboratories.

14 February 2017

CIBJO Releases First Blue Book Devoted to Coral

Milan: CIBJO, the World Jewellery Confederation, has released online its latest Blue Book, delineating acceptable trade practices and nomenclature for the coral industry and trade.

7 October 2015

Tag: Roland Naftule

CIBJO’s Blue Books Available on its Website

CIBJO Releases First Blue Book Devoted to Coral

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