SINCE 1980
Founded in 1980 in Los Angeles, United States, GUILD Gem Laboratories is one of the world’s top gemological laboratories in the identification, grading, origin determination, treatment detection and other aspects of colored gemstones. With a wealth of experience and a comprehensive database in firsthand field research, deep academic knowledge backs up every report from GUILD, whose  comprehensive database covers all the important gemstone varieties in the market. From its start-up gemstone identification institute to its authoritative brand based in the Asia-Pacific region and radiating around the world, GUILD Gem Laboratories radiates at a frequency of excellence within the international colored gemstone industry and is defined by professionalism, experience, science and innovation. Currently, GUILD has branches in Los Angeles, Shenzhen, Guangzhou, Zhuji (Pearl City) and Bangkok, to provide professional gemstone identification services for domestic and foreign practitioners.

Since 1981, GUILD Gem Lab has participated in the 40th consecutive Tucson Jewelry Show,providing on-site identification and consulting services. It was also in 1981 that GUILD beganto carry out continuous research on the origin of color gemstones and market data collection,and gradually established a solid relationship with the miners, dealers and buyers of internation-ally famous color gemstones from Colombia, Brazil, Zambia, Thailand, Sri Lanka, Mozambique,Myanmar and other countries, laying a solid foundation for a series of color gemstone identifica-tion standards and field gemology research.