Appraisal certificates can be forged. There are two kinds of forgeries: \r\n 1, and the certificate that the small workshop churns out by itself is irresponsible. \ r \ nIn this case, you can check online whether the institution that issued the certificate has the qualification of authoritative appraisal, and then determine the credibility of the certificate. A formal jade appraisal certificate must have three signs: CMA, CAL and CNAS. Look at the test content. Including color, total mass, density, refractive index and other items, these items are very strict in the state-certified jewelry and jade testing institutions. Look at the signature of the appraiser. The appraisal certificate must be signed by two appraisers before it is valid. One is an appraiser and the other is an auditor. Look at this seal. Strictly speaking, it should be a steel seal, and the font on it can be clearly recognized. \r\n2 A genuine product is repeatedly appraised by an authoritative appraisal institution, and multiple certificates are issued, and then distributed to similar fakes, which is especially common in bracelets. Just weigh it with an accurate jewelry scale, accurate to two decimal places, compare it with the certificate, and mark the weight in grams. If the error exceeds 0.02g, it can be regarded as an application for certificate. \ r \ For more information about whether the jade appraisal certificate can be forged, please visit:/ask/4417b31615832660.html? Zd view more content