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About NGTC


National Gemstone Testing Center (NGTC) was established and approved by China State Commission Office for Public Sector Reform in 1992, based on Mineralogy and Gemology Research Department of Geological Museum of China which was found in the middle of 1980’s. The main sub-organizations include National Gemological Training Center;  Gems & Jewelry 

Institute; Gems and jewelry related committee, offices, and professional magazines.


Main functions and duties are as followings:

1.Taking investigation and formulating rules, regulations, standards, and relevant policies in gems and jewelry industry.

2.Undertaking the supervision testing, arbitration testing of gems & jewelry for the government and industry, undertaking gems & jewelry testing for the import-export goods.

3.Undertaking the entrusted testing and identification of gems & jewelry for the consumers.

4.Providing various professional and technical training and education in gemology and related fields for the gems & jewelry industry.

5.Undertaking appraisal of gems & jewelry and art crafts.

6.Collecting and distributing information of gems & jewelry industry.

7.Undertaking skill identification and examinations for gemologists, technicians, and salespersons.

8.Performing gemological research activities, promoting international communication and collaboration in gemology and related fields. Popularizing gemological knowledge and culture to the public. Regulating gems and jewelry testing and identification service and promoting national brand names of gems and jewelry.


National Gemstone Testing Center is the state-level and authority organization of gems & jewelry testing and inspecting, authorized by the government. It has passed the various accreditations and certifications from the state-level organizations for the quality supervision, inspection and quarantine. It is the China’s foremost authority in testing and inspection of gems and jewelry. It is also an authorized state-level organization for identifying achievements of science and technology, a testing laboratory for import and export goods, and the appointed laboratory of China Consumer’s Association.