* The yellow certificate is for synthetic diamonds, while the blue certificate is for natural diamonds.
* In the jewelry industry, the test results of all kinds of jewelry are usually summarized and finally compiled into an approval report or certificate, which needs to be signed and calibrated by experimental testers with special qualifications and recognized by the industry, and finally made into an internationally recognized jewelry appraisal certificate.
* The format and details of the certificate vary from country to country, but it usually includes a description of the gem, such as type, size, color and cut, and a statement on whether the gem is genuine, whether it has been processed or optimized, and whether it has been synthesized or recreated.
Generally speaking, whether it is a yellow certificate or a blue certificate, it is the authentication and guarantee of jewelry, and it has certain authority and credibility.