State Inspection South China Jewelry Testing Center, affiliated to State Inspection South China Jewelry Testing (Shenzhen) Co., Ltd., is a regular jewelry and jade testing station approved by Guangdong Provincial Bureau of Quality and Technical Supervision, specializing in quality testing, certification and appraisal of third-party products such as jewelry and jade, raw materials, precious metals and diamond jewelry.

It has been recognized by China National Accreditation Committee for Conformity Assessment and CMA metrology certification, providing high-quality technical services for all sectors of society and issuing authoritative testing certificates and reports.

3. The appraisal content on the certificate should be comprehensive and detailed.

At first glance, the testing contents, including the name of jewelry, internal color, clarity, total mass, density, refractive index and other items, are very strict in the nationally certified jewelry and jade testing institutions. However, the color of jade surface began from the previous year, and the appraisal agency generally does not explain it, only that the reason is undetermined.

Second, look at the signature of the appraiser. The appraisal certificate must be signed by two appraisers to be valid. One is an appraiser and the other is an auditor.

Third, look at the seal, strictly speaking, it should be steel seal, and the font on it can be clearly identified.

Fourth, look at the serial number. There is the serial number of this certificate on the back of the appraisal certificate, which should be consistent with the serial number posted on the back of the physical object. The purity inspection certificate of precious metal ornaments should pay the most attention to the types and contents of precious metals.