Beijing Dida Gem Testing Center is located in China Geo University. It was registered as a self-supporting institution with independent legal personality in Beijing in June, 1995. It is the earliest institution engaged in jewelry appraisal and research in China. 1June, 1997, it was officially renamed as Beijing Gemstone Inspection Center by Document No.259 of China Geo University, and started the standardized and international laboratory construction and management. Our business includes: gem identification and improvement, research on new materials and methods, development, popularization and application of gem detection instruments, gem inspection and identification services, consultation and personnel training.