There are diamond certificates, such as GIA certificate, NGTC certificate, national inspection certificate, these certificates can go to the official website to check the true and false; Test temperature: Real diamond does not heat transfer, can be tested by changing the ambient temperature; Use refraction: put the diamond flat on a straight line, observe the straight line through the diamond, if the line at both ends of the diamond edge and the line through the diamond are broken or deformed, it can be determined that it is a real diamond.
