National Jewelry and Jade Quality Supervision and Inspection Center, No.2 A, Datun Road, Chaoyang District Tel: 6487 197 1
1/F, Affiliated Building of Ministry of Land and Resources, No.30 Xisiyang Hutong, Bao Zhongxie Gemstone Testing Center Tel: 66557585
Building b216th Floor, Chengming Building, Xizhimen, Xicheng District B 16G National Federation of Industry and Commerce Jewelry Testing and Research Center Tel: 66 169533
China Geo University Dida Gem Testing Center, No.29 Xueyuan Road, Haidian District, Beijing Tel: 82323039
Room 703, Zhong Yi Building, Li Jixiang 103, Chaowai Street, Beijing, Beijing Gaode Jewelry Appraisal Institute, China Laboratory of International Jewelry Federation Tel: 65520263.
Room 5 18, Building Li Nan 17, Muxidi, Xicheng District, Beijing, China. The quality supervision and inspection center of anti-counterfeiting products of the Ministry of Public Security Tel: 63537336 66024598.
Room 3303, New Teaching Building, Zhongguancun, Haidian District, Peking University Xinghua Gem Appraisal Center Tel: 62755676