The diamond certificate is actually the certificate of diamond ring classification, or its quality assurance certificate, which is actually the most basic for its 4C standard. Many jewelry experts make reports according to some strict basis and under some specific circumstances, so the appraisal certificate is very important for buyers, because it is related to a series of after-sales service problems in the future.

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Appraisal skills of diamond certificate;

1, according to the certificate number and diamond carat size, go to the corresponding testing institution official website to inquire about the certificate information. Official website address will be printed on the back of each certificate. If not, you can search through Baidu.

2. See if the number of the laser mark on the diamond waist that matches the certificate is consistent with the certificate. When buying diamonds with laser marks such as GIA or IGI, please ask the staff to guide and assist you to use professional 10 magnification magnifier, professional diamond lamp, diamond table and other tools to verify the laser marks with your own eyes in a correct and simple way.

3. See if the defect position of the diamond is consistent with the mark on the certificate. If you buy any diamond with an international certificate, there is a clear defect location map on the certificate. If it is uncertain whether the defect location is consistent with the certificate, it is recommended to re-examine it in a third-party appraisal institution.

4. Check whether the official website certificate number is consistent with the laser mark, and verify the diamond weight with a special electronic scale.

Baidu Encyclopedia-Diamond Certificate