GemResearch.ch
Title
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 clarity color ruby sapphire Gemresearch Swisslab cavities.