Guangdong Provincial Technical Supervision Jewelry and Jade Quality Supervision and Inspection Station 75 1 Guangzhou Dongfeng East Road 020-877771-3298/020-87696716, turn 809.
Gemstone Research and Appraisal Center of Sun Yat-sen University, No.0/35 Xinxiang West Road, Guangzhou 020-84 186300-2390
Gem Appraisal Center of Guangzhou Institute of Geology, No.739 Dongfeng East Road, Guangzhou 020-8766880 1
NGTC Shenzhen Testing Center, 4th Floor, Investment Building, No.2009 Shennan Avenue, Futian Central District, Shenzhen 0755-829 12709
Room B 1202, Xin Ganghong Garden, Cuizhu Road, Shenzhen Laboratory, National Gold and Silver Products Quality Supervision and Inspection Center 0755-25688667/0755-25624955
0755-25633295 National Jewelry and Jade Quality Supervision and Inspection Center, Zone E, 2nd Floor, Shuibei Jade Wholesale Market, No.7/KLOC-0, Beili North Road, Luohu District, Shenzhen
Peking University Xinghua Gem Appraisal Center (Shenzhen Branch) Room 0755-2121900, Haitian Pavilion, Xingang Honghaoyuan, Tai 'an Road, Luohu District, Shenzhen.
Guangzhou Mineral Resources Supervision and Testing Center, 4th Floor, Block C, Hualin International Pavilion, No.293 Kang Wang Road, Guangzhou 4087-4090 13427547225.
I don't know if I don't go to work on weekends, but I definitely don't go to work on holidays.
The cost of taking a new test depends on what you want to test.