2. If it's a GIA diamond, you can use a diamond inspection pen to identify whether it's a natural diamond excluding artificial diamonds, and then use a waistline mirror to check the laser code of the diamond waistline, and then check whether it is consistent with the certificate and official website. If they are consistent, the authenticity and grade of the diamond can be determined. Note: If the diamond has no girth laser code, the grade of the diamond is uncertain. It is recommended to buy diamonds with girth laser codes. Let's talk about Carla Diamond.

3. Be sure to take the appraisal result as the standard, because now some related households in the industry can issue water injection certificates in non-national appraisal centers! (Water injection certificate is a certificate issued to improve the clarity, color or cut of diamonds by 1-2. There are more than 100 jewelry appraisal institutions in China, but there are only about 23 authoritative appraisal institutions in China. Others are provinces and cities or other appraisal institutions!