GemResearch Swisslab (GRS) Specializing in Origin Determination of Fine Rubies and Sapphires
GemResearch Swisslab (GRS) is a gemstone testing laboratory with state-of-the-art instrumentation. GRS Heat Treatment thermal treatment gemmological heat enhancement process clarity color diamond ruby sapphire.
gemresearch swisslab, adolf peretti, grl, grs, sem, scanning election microscope, future gemmological research, gem lab, geology, mineralogy, gemmological consultance, gemstones testing, issuance gemstone reports, gemstone software, jewelry investments, gemstones evalua
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