|
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 Gemresearch... gemresearch.ch gemresearch swisslab, adolf peretti, grl, grs, sem Alexa Rank: #5,835,164 Google PR: 4 of 10 Daily Visits: 94 Website Value: $677 USD |