This is the test center in Shanghai:
National Light Industry Jewellery Quality Supervision and Inspection Center
National Gold and Silver Quality Supervision and Inspection Center
East China University of Science and Technology Gem Testing Center
Shanghai zhongbaobao jade testing center
Shanghai jewellery detection identification center
Full-box 50 yuan below 0.50ct, 0.50 CT- 1.00 CT 100 Yuan, 1.00 CT- 1.50 CT is about 150 yuan.