SSEF Swiss Gemmological Institute The SSEF Swiss Gemmological Institute is an independent, international, non-profit organisation dedicated to the identification of gemstones, gemstone treatments, origin determination, gemmological research and education.
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Gubelin Gemmological Laboratories the world's most renowned gem laboratory Gubelin Gemmological Laboratory keeping our gemstone report with traditions high standards, independent opinion of the laboratory, constant inovation and up to date technologies make the Gubelin Gemmological Laboratory the world most reknowned gem laborat
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GemResearch Swisslab (GRS) Specializing in Origin Determination of Fine Rubies and Sapphires 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 clarity color ruby sapphire
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