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.
     Depending on the profound academic research background and a large number of researchon the origin of color gemstones and market identification data, GUILD Gem Lab has built anenterprise database covering all common gem categories in the market. Focus, accumulation,cohesion and breakthrough. From the start-up appraisal institution on the east coast of thePacific Ocean to the authoritative appraisal brand based in the Asia Pacific and radiatingaround the world, every development node of GUILD Gem Lab resonates with the internationalcolor gem industry on the same frequency.
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