New England Gemological Laboratory and Appraisal Services, LLC - Fine jewelry appraisals by an independent team. Services, price list, and location map. In Manchester, CT. 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. American Gem Society Laboratories - Provides diamond grading services featuring grading of the diamond cut. 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. 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. GemResearch Swisslab - Determination of the authenticity and country of origin of a rubies and sapphires. Offers gemstone reports and inscriptions. Gemmological Association of Great Britain - Offers gem grading and identification services and courses for the trade and members. Gubelin Gemmological Laboratories - Independent service provides general information on gemstones, ongoing research and lab report services.