The Gemological Institute of America, GIA, is the world's foremost authority in gemology, diamond grading, jewelry education, gemology research, diamond and gemstone grading reports and laboratory services. Gemological Institute of America...
Official web site of the Jewelers Vigilance Committee, formed in 1912 to provide education and self-regulation to the jewelry industry. Members operate under the highest standards of business practice after pledging to comply with all laws...
The American Gem Society offers you superior diamond education and appraisal. Our certified gemstone and diamond experts will provide you with high quality service and information.
A non-profit making organization whose principal objectives are the scientific study of gem materials, education, and libraries of gem materials. Courses, laboratory services, and contact information.
Welcome to Diamonds.net - home of RapNet® Diamond Trading Network, INDEX® - Internet Diamond Exchange, Rapaport Diamond Price Sheets, and Rapaport News Center.
Producers of The Guide to Wholesale Gem Pricing and The Guide Appraisal Software for the Jewelry Industry. The Guide includes pricing for Diamonds, Colored Stones, Pearls, Opals & Jade.