No.9, Zhuanglu, Andingmenwai Street, Beijing, National Jewelry and Jade Quality Supervision and Inspection Center 010-8427363710013.

6487 197 1

Peking University Zhongguancun Gem Appraisal Center, Haidian District, Beijing 010-6275567610071

Floor 1, Affiliated Building of Ministry of Land and Resources, No.30 Xisiyang Hutong, Bao Zhongxie Gemstone Testing Center, 66557585

B2 Floor, Chengming Building, Xizhimen, Xicheng District 16, Jewelry Testing and Research Center of National Federation of Industry and Commerce B 16G 66 169533.

82323039, No.29 Xueyuan Road, Haidian District, Beijing, China Geo University, Beijing Dida Gem Testing Center.

International Jewelry Federation China Laboratory Beijing Gaode Jewelry Appraisal Institute

Room 65520263, Room 703, Zhong Yi Building, Auspicious Lane, Chaowai Street 103

Room 5 18, Building No.5 17, Nanli, Muxidi, Xicheng District, Beijing 635373366024598

Room 3303, New Teaching Building of Peking University, Zhongguancun, Haidian District, Peking University Xinghua Gem Appraisal Center, 62755676.

Find a convenient place for yourself, and you'd better go to Huang Zhuang, I suggest.