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...More
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 : Gemology Research and Education.
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.
Welcome to Diamonds.net - home of RapNet® Diamond Trading Network, INDEX® - Internet Diamond Exchange, Rapaport Diamond Price Sheets, and Rapaport News Center.
A Diamond Is Forever is the world's leading diamond information and referral resource. Combining promotion with education, we help you choose or design diamond jewelry to last a lifetime.
Since 1996, the AGS Laboratories has provided modern diamond grading services to members of the industry. Today, we continue with our innovative approaches to diamond grading and consistently adhere to the AGS consumer protection ethics and...
Get Site Info