GUILD GEMSTONE LABORATORY

GUILD Gemstone Laboratory is composed of Mr Charles Carmona was founded in Los Ange-les in July 1980. For more than 40 years, GUILD Gem Lab has always been committed to theresearch, identification, science popularization and promotion of color gemstones, and hasrich experience and massive achievements in the field of building a standardized system inthe color gem market... Founded in 1980 in Los Angeles, Provide professional gemstone identification services for domestic and foreign practitioners.

Also known as: GUILD Gem Lab