National appraisal standard:

Acronym of GB Pinyin, T stands for promotion (optional standard), 16552 is the number, (20 10 is the release time, which is generally omitted).

GB/T 16552 "Jewelry and Jade Names" mainly focuses on the name of the appraisal object and the description of the first level.

GB/T 16553, identification of jewelry and jade, specific identification methods.

GB/T 16554 refers to diamond classification, while GB/T 18043 and GB/T1887 refer to the purity of gold and silver, which has nothing to do with Hetian jade and will not be explained.

Certificate mark

The certificate must first include: metrology, national accreditation and licensing Committee, international and domestic laboratory organizations, and quality supervision station certification.

The fine print below the certificate is the authentication number of the quality supervision station, which can identify the authenticity of the certificate and find the corresponding institution on the Internet. If there is no authentication or the authentication information is wrong, the certificate may be fake.

As for why there is suet jade, the main reason is that it meets the relevant standards (mainly whiteness) of suet jade in the test.

Hope to adopt!