1, depending on the inspection agency. The state has strict requirements on the qualification of quality appraisal institutions of jewelry and Hetian jade, and only the appraisal certificate issued by the recognized appraisal institutions is valid. Formal hetian jade appraisal certificate will generally have one of the words CMA, CAL and cncal. If there are none of the three, it is a false certificate.

2. The meaning of the word mark. Hetian jade appraisal certificate marked with CMA refers to the metrological certification and evaluation institution composed of the state or province, and the metrological certification unit that has passed the evaluation; CAL is a nationally recognized testing institution; CNACL is a testing organization accredited by China Laboratory.

3. Look at the content of the test. Formal Hetian jade appraisal certificate will indicate the specific test contents, mainly including the name, color, purity, total mass, density and refractive index of Hetian jade finished products, and there are strict requirements for the inspection of these appraisal indexes. If not, it may be a false certificate.

4. Look at the signature of the appraiser. Usually, the appraisal certificate of Hetian jade needs to be signed by appraisers and reviewers at the same time, and the appraisal certificate of Hetian jade can only take effect if two people sign at the same time.

5. Look at this seal. Strictly speaking, the seal stamped on Hetian jade appraisal certificate must be steel seal, and the handwriting on the steel seal must be legible.

6. Look at the numbers. There will be a specific certificate number on the back of each appraisal certificate, and the certificate number must be exactly the same as the number indicated on the physical object.