So what is the concept of a diamond certificate? The diamond experts of Kelan Diamond Network will give you a detailed interpretation of the current major certificates so that you can understand them clearly. A diamond certificate, also known as a diamond grading report or a diamond quality report, is made by jewelry experts who carefully examine the diamond and put it under a magnifying glass to analyze its size, clarity, cut, color, polish, symmetry, and other characteristics to form a report. The diamond jewelry provided by Kelan Diamond Network are all accompanied by authoritative certificates. The diamond jewelry provided by Kelan Diamond Network are analyzed and graded by international authoritative appraisal institutions, such as the Gemological Institute of America (GIA) and the High Council of Diamonds of Belgium (HRD). , or by national or local authoritative appraisal institutions, such as the National Gold and Silver Products Quality Supervision and Inspection Center. Kelan Diamond Network insists on selecting the most professional and authoritative appraisal institutions in the diamond industry. These appraisal organizations are known for their rigorous, consistent and fair appraisal of diamonds. And well-known in the global diamond industry. In order to provide customers with authoritative diamond data and price reference. Certificates that can be browsed when purchasing From us, you can browse the diamond grading certificates we provide you. Please continue browsing to learn more about each diamond grading report. The GIA diamond grade certificate is signed and issued by the Gemological Institute of America (GIA). HRD diamond grade certificate, signed and issued by the Belgian Diamond High Council. AGS diamond grade certificate, signed and issued by the American Gemological Society. IGI diamond grade certificate, signed and issued by the International Gemological Institute. EGL diamond grade certificate, signed and issued by the European Gemological Institute. GJC Jewelry Inspection Certificate, issued by the Light Industry Jewelry and Jade Jewelry Quality Supervision and Inspection Center. The Gem Grading Certificate of East China University of Science and Technology is issued by the Gem Testing Center of East China University of Science and Technology in Shanghai.