Identification and classification mainly refers to the detailed classification and evaluation of diamonds with larger particles and better quality. Because the appraisal classification has higher requirements on environment, equipment, methods and personnel, it is only effective if there are more than two appraisers in the laboratory to make unified appraisal and sign. Appraisal grading is a fair and objective grading evaluation of the quality of diamonds from the perspective of a third party, so the appraisal grading does not consider the price of diamonds.
China also has its own grading standards. The grading evaluation of diamonds in China started late. China's diamond grading is strictly conservative, one level stricter than GIA, while GIA is one level looser than China. Of course, GIA is famous, the production cost is high, and the certificate is gorgeous. The cost depends on the shape, size and color of the diamond. Carat and above, 700 yuan and above are not capped. Counting the round-trip transportation costs, it is estimated that a carat diamond can't be identified without 2000 yuan, so the price of diamonds cast into GIA is also relatively high, and the cost is there. It costs tens of yuan to get an appraisal certificate in China, and the highest one may be 200 yuan. In recent years, China's appraisal level has also improved, which is in line with international standards. It is said that China will build an identification base in India and prepare to go abroad. Hehe, in fact, choosing national inspection does not mean that diamonds are not good, but rather pragmatic, hehe! By the way, the origin of diamonds is sometimes included in the national inspection certificate. Some people think this is nonsense. In fact, in some international certificates, as long as you pay the origin appraisal fee, he will also show you the origin! I hope I can help you.