● Quality inspection system: Jewelry Inspection Room of Guangxi Product Quality Supervision and Inspection Institute, Yunnan Geology and Mineral Jewelry Testing Center, Guangdong Gold and Silver Jewelry Testing Center, Jewelry Testing Center of China Geo University (Wuhan), Jewelry Testing Research Center of Jewellery Chamber of the All-China Federation of Industry and Commerce, National Jewelry and Jade Quality Supervision and Inspection Center (formerly affiliated to Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources), etc.
● Geology and mineral system: Yunnan Geology and Mineral Jewelry Testing Center, etc.
● Gold Company: Guangdong Gold, Silver and Jewelry Testing Center, etc.
● Education system: Jewelry Testing Center of China Geo University (Wuhan), etc.
● Industry Association: Jewellery Testing and Research Center of Jewellery Chamber of the All-China Federation of Industry and Commerce.
● National level: National Jewelry and Jade Quality Supervision and Inspection Center (formerly affiliated to the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources).
● Provincial level: Yunnan Jewelry Quality Supervision and Inspection Institute (under Yunnan Quality and Technical Supervision Bureau), etc.
● Municipal level: Dalian Gold, Silver and Jewelry Supervision and Inspection Center (affiliated to the Product Quality Supervision and Inspection Institute of Dalian Quality and Technical Supervision Bureau).
It is suggested to choose an authoritative and fair institution to ensure the accuracy of the appraisal results.