Adamas Gemological Laboratory
Provides technical and gemological appraisal and consulting services to the trade and the public. Services, articles, and links.
American Gem Society Laboratories
Provides diamond grading services featuring grading of the diamond cut.
European Gemological Laboratory USA
Provides diamond, colored stone and pearls certification, analysis and consultations for the jewelry trade. Produces educational and promotional materials.
GemLab
Specializes in origin of color determination for fancy colored diamonds using Raman spectrometer. Offers diamond grading reports and appraisal services.
Gemmological Association and Gem Testing Laboratory of Great Britain
Offers gem grading and identification services and gemmological courses for the trade and members.
GemResearch Swisslab
Determination of the authenticity and country of origin of a rubies and sapphires. Offers gemstone reports and inscriptions.
GIA Gem Trade Laboratory
Provides grading and identification of diamonds, colored stones or pearls for the industry and consumers.
Global Gemological Laboratory
Offers mini and full diamond grading reports and appraisals for the trade. Located in Bellevue, Washington
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.
Realgems Gemological Laboratory
Technical advisers, appraisers, gemological training. Services, background, and contact information. Located in Brazil.
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.
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