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GemResearch Swisslab (GRS) Specializing in Origin Determination of Fine Rubies and Sapphires
Description: GemResearch Swisslab (GRS) has invented its own high technology portable gemmological laboratory, computerised and with state-of-the-art spectrometers. GRS Heat Treatment thermal treatment gemmological heat enhancement process ...
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New England Gemological Laboratory offers Gem and Jewelry appraisal services in Massachusetts (MA) and Connecticut (CT) by our qualified appraisers Cynthia and ...
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An independent, international, non-profit organisation dedicated to the identification, treatment, and origin. Services, education, and contact information. Located ...
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Specializes in origin of color determination for fancy colored diamonds using Raman spectrometer. Offers diamond grading reports and appraisal services.
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