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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.
http://www.ssef.ch/
Adamas Gemological Laboratory
Provides technical and gemological appraisal and consulting services to the trade and the public. Services, articles, and links.
http://www.gis.net/~adamas/
Realgems Gemological Laboratory
Technical advisers, appraisers, gemological training. Services, background, and contact information. Located in Brazil.
http://www.realg.com.br
Gubelin Gemmological Laboratories
Independent service provides general information on gemstones, ongoing research and lab report services.
http://www.gubelinlab.com/
New England Gemological Laboratory and Appraisal Services, LLC
Fine jewelry appraisals by an independent team. Services, price list, and location map. In Manchester, CT.
http://www.negemlab.com
American Gem Society Laboratories
Provides diamond grading services featuring grading of the diamond cut.
http://www.agslab.com/
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.
http://www.gemology.ru/
Gemmological Association and Gem Testing Laboratory of Great Britain
Offers gem grading and identification services and gemmological courses for the trade and members.
http://www.gagtl.ac.uk/
Global Gemological Laboratory
Offers mini and full diamond grading reports and appraisals for the trade. Located in Bellevue, Washington
http://www.globalgemlab.com/
GIA Gem Trade Laboratory
Provides grading and identification of diamonds, colored stones or pearls for the industry and consumers.
http://www.gia.org/gemtradelab/
European Gemological Laboratory USA
Provides diamond, colored stone and pearls certification, analysis and consultations for the jewelry trade. Produces educational and promotional materials.
http://www.eglusa.com
GemResearch Swisslab
Determination of the authenticity and country of origin of a rubies and sapphires. Offers gemstone reports and inscriptions.
http://www.gemresearch.ch
GemLab
Specializes in origin of color determination for fancy colored diamonds using Raman spectrometer. Offers diamond grading reports and appraisal services.
http://www.gemlab.net/
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