CIBJO Blue Book Defines Paraíba

In the 2006/07 edition of the CIBJO Blue Books (Annex B – Commercial Names), the name Paraíba stands for any green-to-blue tourmaline colored by copper, regardless of country of origin. The standards found in the Blue Books are established by experts on the subject within CIBJO committees, and from individuals outside the committees who express interest in developing the guidelines. Roland Naftule, Nafco Gems Ltd., Scottsdale, Ariz., president of CIBJO's Sector 3 (Gem Materials, Trade and Laboratories), confirms that Paraíba has been designated a color variety of elbaite tourmaline containing copper and manganese. “CIBJO is the only official international body that regularly votes and assigns gemstone variety names,” Naftule explains. Both CIBJO and the Laboratory Manual Harmonization Committee define Paraíba tourmaline as a trade name that refers to color and composition with

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