Gia belongs to American Gemological Institute, CNAS CNAB CNAL is valid for any of the above three marks, especially the first mark cma, which is the basic requirement of national laws for testing and inspection institutions.

At present, due to the increasingly mature market competition and consumer psychology, and in order to cope with the increasingly sophisticated means of counterfeiting in the jewelry industry, testing and inspection institutions must constantly improve their technical level, testing ability and management means, so many testing and inspection institutions have the above three signs at the same time, and have the ability and level required by the three signs. It can be understood that with the identification certificate of the above three marks, there are "three risks".

On the other hand, Gra is an institution with nowhere to prove its authority.

GIA certificate of mosan diamond