It is called Jewelry Testing Center of China Geo University, and now it is affiliated to Jewelry College of China Geo University. It is located in the campus of Xueyuan Road Geological University, No.29 Xueyuan Road, Haidian District, Beijing. I remember it was on the left side of the main entrance, 0 10-82323039. You can call for other information.

In addition, there is China Geo University (Wuhan) Jewelry Testing Center (Hubei Jewelry Quality Supervision and Inspection Station), which is located in Yoga Mountain in Wuhan and turns from Luxiang to China Geo University. Telephone number: (027)8748 1009/63686

Shenzhen also has the Jewelry Testing Center of China Geo University, located at No.0/09, Tianbei 4th Road, Shenzhen City, Guangdong Province.