The goldsmith's diamond certificate is not inspected by the state. The diamond certificates of "Goldsmith Family" are issued by themselves or other authoritative third-party institutions, not national quality inspection institutions. In China, fair jewelry appraisal and certificate issuance are carried out by official institutions such as China Jewelry and Jade Quality Assessment Center and China Jewelry and Jade Testing Center, and the certificates issued by them are of national authoritative certification significance. Moreover, the jewelry industry also has international standard diamond certificates, which are issued by the American Gemological Institute, GIA and other international authoritative certification bodies. These certificates are internationally accepted. Goldsmith family is a jewelry brand in China, mainly engaged in the production, processing, wholesale and sales of precious jewelry such as jewelry, diamonds and gold. The company was established in 1994, and its headquarters is located in Shenzhen, Guangdong Province, China.