The methods to identify the authenticity of jewelry appraisal certificate include: checking whether it is printed by machine, checking the qualification of certificate institution and whether the certificate is printed with institution information. The state forces the printing of identification certificates for machines, and the identification certificates filled in by hand have no reference value.

So how to distinguish the authenticity of the jewelry appraisal certificate? Look at the certificate sign: when buying jewelry, don't trust the merchant's verbal promise, but ask the merchant for an authoritative jewelry appraisal certificate.

Jewelry appraisal certificate depends on whether it is a nationally recognized appraisal institution. CMA, CAL and CNAS are national certified institutions. 2. It depends on whether the jewelry appraisal book is stamped. This seal must be clearly stamped.

Look at the certificate seal. There is usually a steel seal on the jewelry appraisal certificate. The formal certificate has a deep steel seal, clear marks and legible fonts. Look at the serial number on the back of the appraisal certificate, which should be consistent with the serial number posted on the back of the physical object.

The method of distinguishing authenticity: check whether the jewelry and jade appraisal certificate has CMA, CAL, CNAS and other nationally recognized appraisal marks. Each appraisal certificate is marked with the inspection number (or experiment number), with a two-dimensional code indicating the inspection unit, official website and other information.

Look at the certification marks such as CMA, CAL or CNAS of the testing organization, CMA must appear. The certificate contains the photo, name, color, clarity, weight, density and refractive index of the inspected jewelry.