2. National Jewelry and Jade Quality Supervision and Inspection Center, also known as National Inspection (NGTC), is a national-level jewelry and jade quality inspection institution authorized by China's General Administration of Quality Supervision, Inspection and Quarantine according to law, and is the authoritative organization for jewelry and jade inspection in China.
3. National accredited testing institutions. Such as (E 95) Wuhan Gold and Silver Jewelry Testing Center (Z 10).
4. Beijing is definitely the area with the densest appraisal industry in China, where there are the best appraisal institutions and the most fraudsters. Therefore, if you want to find a reliable appraisal institution, you'd better choose the most well-known large-scale institution, such as Beijing Shiqu Ji Ya Appraisal Center, which is a well-known large-scale institution in China.
5. Jadeite can be identified by an institution with gem identification qualification. Identification of jadeite can go to the local jewelry and jade quality supervision and testing center, which is more authoritative. In addition, in some jade crystal wholesale distribution centers, such as Sihui, Donghai and other cities, there will also be gem testing institutions.