Jewelry appraisal certificate is a public trust certificate issued to the authenticity and attributes of rare precious metals, precious stones or jewelry products, which is implemented by professional institutions and professionals who meet the appraisal qualifications.
The National Jewelry and Jade Quality Supervision and Inspection Center (hereinafter referred to as the Inspection Center) is a national professional quality inspection institution authorized by the relevant competent departments of the state according to law, and it is the authoritative institution for jewelry and jade testing in China. The inspection center provides entrusted inspection services to the society, undertakes national market supervision and inspection, arbitration inspection, import and export commodity inspection, and formulates and revises relevant national standards. It plays a guiding role in standardizing the domestic jewelry market and promoting the healthy development of the jewelry industry.
Jewelry appraisal certificate is a public trust certificate issued by a professional institution that meets the appraisal qualification and a professional who holds the post qualification of precious metals, precious stones or finished jewelry.
1. See if the certificate is authoritative. If your certificate does not have any of the above five signs, it basically has no credibility.
2. See if the contents of the certificate are consistent with the real thing.
3. In the column of "Remarks", some special samples will be encountered in the general testing process, which will be explained in the remarks. For example, in the jade appraisal certificate, once colorless oil optimization is involved, it is obvious that purity optimization will be indicated in the remarks. Remarks column can also be the commodity name of the sample, the matching stone type of the finished jewelry and so on.
4. Everything above the standard must meet several standards, and the source of its identification basis will be indicated on the certificate.
5. Signature In addition, the certificate must be signed by more than two appraisers (mostly handwritten). Very few testing institutions are signed by machines, such as the verification and testing of certificates issued by the Jewelry Testing Center of Geological University.
6. Other written materials Every independent appraisal institution has the official seal of the department, and the appraisal certificate must be stamped with the official seal of the unit. The content of steel seal, as the identification of the authenticity of the certificate, is often stamped after the certificate is plastic-sealed, which can be clearly touched by hand. The full name of the issuing agency must be printed on the steel seal, and individual agencies will also have department codes. Each appraisal certificate has an independent and non-repetitive number, which is the certificate number of the certificate.
7. Contact information and identification Each testing institution has its laboratory address and independent website. This information will also appear on the certificate. In addition, the full name, logo and telephone number of the testing institution are also essential. The qualification mark mentioned in the previous link must also appear on the certificate.
8. Anti-counterfeiting information, such as anti-counterfeiting codes, laser anti-counterfeiting labels, and fluorescent marks visible under ultraviolet light. In NGTC.