Authority. Beijing National Inspection Gemstone Jewelry Appraisal Center has passed the qualification certification of national quality supervision, inspection and testing institutions, and is the authoritative institution for domestic jewelry inspection and testing. The center has a number of technical backbones who have been engaged in inspection and testing for many years. Jewelry inspectors have the qualification of national jewelry quality inspectors, and the center has a variety of international cutting-edge testing instruments. The talents of the center and the advantages of advanced testing instruments provide strong technical support for testing services. Jewelry has a broad sense and a narrow sense. Jewelry in a narrow sense refers to jade products, while jewelry in a broad sense should include gold, silver and natural materials (minerals, rocks, organisms, etc. ).