CIBJO publishes updated gemstone book
CIBJO has released the latest version of the Gemstone Book, the World Jewellery Confederation announced May 24. The book is one of CIBJO's Blue Books, a set of standards for the grading, standards terminology and nomenclature for the jewelry industry. This is the third book released since the CIBJO Congress in Munich, Germany, in February. The first was the Pearl Book, followed by the Precious Metals Book released earlier this month.
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