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European Gemological Laboratory USA (Popularity: ): Provides diamond, colored stone and pearls certification, analysis and consultations for the jewelry trade. Produces educational and promotional materials.
Russian Gemological Server (Popularity: ): Offers gemstone analysis software, gemological education, and gemological laboratory services. Includes articles on diamond cut studies and a gallery of ...
American Gem Society Laboratories (Popularity: ): Provides diamond grading services featuring grading of the diamond cut.
New England Gemological Laboratory and Appraisal Services, LLC (Popularity: ): Fine jewelry appraisals by an independent team. Services, price list, and location map. In Manchester, CT.
SSEF Swiss Gemmological Institute (Popularity: ): An independent, international, non-profit organisation dedicated to the identification, treatment, and origin. Services, education, and contact information. Located in Switzerland.
GemResearch Swisslab (Popularity: ): Determination of the authenticity and country of origin of a rubies and sapphires. Offers gemstone reports and inscriptions.
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Global Gemological Laboratory (Popularity: ): Offers mini and full diamond grading reports and appraisals for the trade. Located in Bellevue, Washington
GemResearch Swisslab (Popularity: ): Determination of the authenticity and country of origin of a rubies and sapphires. Offers gemstone reports and inscriptions.
SSEF Swiss Gemmological Institute (Popularity: ): An independent, international, non-profit organisation dedicated to the identification, treatment, and origin. Services, education, and contact information. Located in Switzerland.
New England Gemological Laboratory and Appraisal Services, LLC (Popularity: ): Fine jewelry appraisals by an independent team. Services, price list, and location map. In Manchester, CT.
American Gem Society Laboratories (Popularity: ): Provides diamond grading services featuring grading of the diamond cut.
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