American Gem Society Laboratories
Provides diamond grading services featuring grading of the diamond cut.
EGL USA Gemological Laboratory
Providing analysis, reports, and supporting services for diamonds, colored diamonds, colored gemstones, pearls, and mounted jewelry. Operating exclusively in North America.
Gemmological Association of Great Britain
Offers gem grading and identification services and courses for the trade and members.
Determination of the authenticity and country of origin of a rubies and sapphires. Offers gemstone reports and inscriptions.
Gubelin Gemmological Laboratories
Independent service provides general information on gemstones, ongoing research and lab report services.
New England Gemological Laboratory and Appraisal Services, LLC
Fine jewelry appraisals by an independent team. Services, price list, and location map. In Manchester, CT.
Russian Gemological Server
Offers gemstone analysis software, gemological education, and gemological laboratory services. Includes articles on diamond cut studies and a gallery of virtual diamond images.
SSEF Swiss Gemmological Institute
An independent, international, non-profit organisation dedicated to the identification, treatment, and origin. Services, education, and contact information. Located in Switzerland.
Last update:February 26, 2015 at 17:54:04 UTC