The grades of drilling certificate are divided into several categories. No matter what needs to be graded, the higher the grade, the better the quality, and so do diamonds. So what are the grades of diamond certificate? What are the grades?

Diamond certificate grade

We often say "diamond appraisal certificate" and "diamond grade certificate", to be precise, it should be called "diamond grade report". It is a report formed after careful observation and testing of diamonds by jewelry experts in a specific environment according to strict grading standards. The following are some common diamond grade certificates:

International certificate:

1, GIA diamond grade certificate -GIA) 2. HRD Diamond Grade Certificate-Belgian Diamond High Council.

3.AGS Diamond Grade Certificate-American Gemological Society 4. IGI diamond grade certificate-international gemological institute.

5.EGL Diamond Grade Certificate-European Gemological Institute

Domestic certificate:

1, NGTC diamond grading certificate -2 NGDTC diamond grading certificate of National Jewelry and Jade Quality Supervision and Inspection Center-by National Gold and Diamond Products Quality Supervision and Inspection Center.

3.NJQSIC certificate-4 GIC diamond grading certificate of National Jewelry and Jade Quality Supervision and Inspection Center-Dida Gemstone Inspection Center of China Geo University.

5.GAC Diamond Grading Certificate-Grade 6 CTA Diamond Grading Certificate of China Gemstone Association-China Quality Inspection Alliance and China Inspection Warner Quality and Technology Center.

7.GJC Jewellery Inspection Certificate -8 GTC Jewellery Appraisal Certificate National Light Industry Jewellery Quality Supervision and Inspection Center-Jewellery Inspection and Research Center of Jewellery Chamber of Commerce of the National Federation of Industry and Commerce.