The diamond certificate is based on the 4C standard. The diamond certificate is based on the 4C standard by the jewelry experts in a professional environment. The diamond certificate is based on the 4C standard. The jewelry experts carefully observe and test the diamond in the professional environment according to strict grading standards. A report, because the diamond certificate is based on the '4C' standard, the diamond certificate is based on the '4C' standard by jewelry experts in a professional environment, and the jewelry experts follow strict grading standards in a professional environment Carefully observe and test the diamonds to get a report, so the diamond certificate can also be called a diamond grading report or a diamond quality report. Generally, the basic information contained in a diamond certificate will be explained in detail from the weight, size and shape of the diamond to every cut index, and the requirements for the accuracy of the description are extremely stringent. Now, the internationally recognized diamond grade certificates are as follows: The Gemological Institute of America GIA Diamond Grade Certificate The Gemological Institute of America is an independent non-profit organization. GIA funds are donated by people in the jewelry industry, and the GIA diamond grade certificate is international. It is recognized within and is one of the world's authority in gemstone circles. The GIA Gemological Institute of America is the pioneer of the diamond '4C' standard. It has a history of nearly 70 years. In the 1990s, the GIA certificate entered the Chinese market with a large influx of American diamonds, and it became highly recognized in China. One of the international certificates. The International Gemological Institute IGI Diamond Grade Certificate was established in 1975 in Antwerp, Belgium, the world diamond center. It is currently the world’s largest independent gemological identification laboratory and gemological research education institution. It is located in major diamond trading centers around the world (Antwerp). , Toronto, New York, Tokyo, Hong Kong, Dubai, Los Angeles, Mumbai, Tel Aviv) have a total of 12 laboratories, known as the 'authoritative identification agency around consumers.' IGI has professional opinions, extensive experience, and a long-term reputation for integrity and reliability, making IGI International Gemological Institute a model of reference for the world's jewelry industry. Belgian Diamond High-Class Council HRD Diamond Grade Certificate Belgium Diamond High-Class Council is officially recognized as representing the Belgian diamond trade industry, and its headquarters is located in Antwerp, the world diamond center. The Belgian Diamond High-level Parliament will issue three certificates, which contain a complete description of diamond quality, such as diamond shape, clarity level, weight, fluorescence, specifications, color level, polishing level, and ratio. European Gemological Institute EGL Diamond Grade Certificate EGL European Gemological Institute was established by Guy Margel in Belgium in 1974. The international headquarters is located in the Ramat Gan Diamond Exchange building. EGL’s customers are mainly professional diamond retailers, wholesalers and cutting factories. The identification certificate issued by EGL provides all the diamond information including weight, clarity, color, size and other physical properties for the reference of the industry and consumers . American Gems and Jade Society AGS Diamond Grade Certificate AGS American Gems and Jade Society was established in 1934. Its founder Robert M. Shipley is also the founder of the Gemological Institute of America. It is different from other appraisal agencies in that it divides the diamond's cut, color, and clarity from the best 0 to the worst 10 into 11 grades. Diamond processors and wholesalers use the detailed information provided by the AGS certificate in the world Buying batches of diamonds online, and primary consumers can use simple numbers to understand diamond grading. National Jewelry and Jade Quality Supervision and Inspection Center NGTC Diamond Grading Certificate National Jewelry and Jade Quality Supervision and Inspection Center (abbreviated as Inspection Center) is a national-level professional quality inspection agency for jewellery and jade authorized according to law by relevant national authorities. The inspection center is responsible for many tasks such as national market supervision and inspection, arbitration inspection, importer and exporter inspection, and formulation and revision of relevant national standards. It is the authority in China's jewelry and jade inspection. The above is the author's summary of the diamond certificate information for you. The information comes from the Internet. If there is anything wrong, please understand. If you need diamond customization, please visit the official website of jewelry setting. Jewelry setting will serve you wholeheartedly!