DOWNLOAD THE CIBJO BLUE BOOKS FREE OF CHARGE

[Barbra Voltaire, FGG]

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/

[ewagems]

The link seems to be broken.

I found this link:

https://cibjo.org/the-blue-books/

The gemstone book has a list of gemstones starting on page 32 that also has links to Mindat !!

[HHelton]

Thanks Barbra and ewagems, very handy and informative.
The Gemstone book has a ton of info.