Shenzhen Jewelry, Jade and Precious Metals Testing Center can conduct national inspection on Hetian jade seed materials. The following is the detailed address and contact information of the organization:

* Address: Cuizhu Building, No.2028 Cuizhu Road, Luohu District, Shenzhen City, Guangdong Province/floor KLOC-0/5 1504.

* Bus stop nearby: Cuizhu Building. You can take the following buses: 203, 2, 107, 2 12, 33, 379, 376, 59, 62, 40, 83, 977, N2 and N6.

If you need to detect other types of gems or jewels, you can search official website or the Internet to find information about other relevant institutions and laboratories. Before any testing, it is best to consult professionals to determine the testing methods and institutions that best suit your needs.