2. The qualification of the institution must be printed on the certificate. There are five kinds of institutional qualification certification: CAL certification, CMA certification, CNAL certification, CNAS certification and ILAC-MRA certification. The inspection report marked "CMA" can be used for product quality evaluation, results and judicial appraisal, and has legal effect. This symbol only indicates that the organization is a unit that has passed the measurement certification review and is a necessary qualification for any unit that issues a jewelry appraisal certificate.
The certificate must be signed by the inspector. Only the signature of the inspector can guarantee the authority and authenticity of the certificate!
4. The appraisal content on the certificate is comprehensive and detailed. Look at the test content: including the name, color, clarity, total mass, density, refractive index and other items of jewelry, which are very strict in the national certified jewelry and jade testing institutions. See the signature of the appraiser: the appraisal certificate needs the signature of two appraisers to be valid. One is an appraiser and the other is an auditor. Look at the seal: strictly speaking, it should be steel seal, and the font on it can be clearly recognized. Look at the number: there is the number of this certificate on the back of the appraisal certificate, which should be consistent with the number posted on the back of the physical object.