LLG analyses all the coloured stones, and more precisely emeralds, sapphires, rubies, Paraïba tourmalines and spinels. Through the identification process, we are able to determine their quality like treatments, color, transparency and cut.

To obtain a detailed report, we combine the use of traditional gemological instruments with modern equipment such as the Alpha Diamond Analyser II FT-IR to detect specific treatments like polymer, resins and oils used.