GemResearch Swisslab
Determination of the authenticity and country of origin of a rubies and sapphires. Offers gemstone reports and inscriptions.
European Gemological Laboratory USA
Provides diamond, colored stone and pearls certification, analysis and consultations for the jewelry trade. Produces educational and promotional materials.
Global Gemological Laboratory
Offers mini and full diamond grading reports and appraisals for the trade. Located in Bellevue, Washington
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.
American Gem Society Laboratories
Provides diamond grading services featuring grading of the diamond cut.
New England Gemological Laboratory and Appraisal Services, LLC
Fine jewelry appraisals by an independent team. Services, price list, and location map. In Manchester, CT.
Gubelin Gemmological Laboratories
Independent service provides general information on gemstones, ongoing research and lab report services.
Realgems Gemological Laboratory
Technical advisers, appraisers, gemological training. Services, background, and contact information. Located in Brazil.
Adamas Gemological Laboratory
Provides technical and gemological appraisal and consulting services to the trade and the public. Services, articles, and links.
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.