Credible. Peking University Gemological Research Institute is one of the famous gemological appraisal institutions and one of the earlier institutions specializing in gemological research and testing in China. Its appraisal level and technology enjoy a high reputation in the industry, with many senior gemological appraisal experts and strict testing standards and equipment. The expert team of Peking University Gemmology Research Institute is constantly learning and updating the identification technology to adapt to the new development and new challenges in the field of gemmology identification.