Diamond ID card - diamond certificate, also known as diamond grading certificate (diamondgradingreport), diamond quality assurance (diamond qualityreport), is based on the 4C standard for diamonds, carefully observed by jewelers in a specific environment according to strict grading standards And a report on the formation of diamonds. It is an important part of analyzing the size, clarity, cut, polishing, and symmetry of the diamond under a ten-fold magnifying glass. It also includes determining the color level of the diamond, fluorescence detection, and the like. There are currently six types of internationally recognized diamond grade certificates: 1. GIA Institute of America - GIA Diamond Grade Certificate is a relatively authoritative diamond identity certificate. The Gemological Institute of the United States is an independent, not-for-profit organization that is known as the authority of the gem world in the world and is known for its fairness. The Academy's groundbreaking research and its own education, experimentation and equipment development process are almost a chronicle of the growth of the jewelry industry. The GIA Diamond Grading Report and GIA Diamond Processing are considered to be the world's number one gemstone certificate. Diamonds of all shapes and sizes are sent to the college for analysis and grading from all corners of the world. 2. Belgian Diamond High-Level Council - HRD Diamond Grade Certificate The Belgian Diamond High Class Council is officially recognized as representing the Belgian diamond trade industry. The HRD Diamond Color Certificate focuses on the detailed characteristics that determine the value of colored diamonds, such as color description, design, and luminescence. It plays an important role in whether a diamond is a natural colored diamond or a diamond. 3, the United States gemstone society - AGS diamond grade certificate The American Gemological Society leads the industry through rigorous grading standards and detailed information. Primary consumers can understand diamond grading with easy-to-understand numbers and methods. Diamond wholesalers and processors often use the detailed diamond information provided by the AGS certificate to purchase bulk diamonds in the world. 4. International Gemological Institute - IGI Diamond Grade Certificate Located in Antwerp, the International Gemological Institute is the world's oldest gemological institute, and its authority on diamond certificates is recognized worldwide. The IGI Diamond Report is essentially a statement that uses a world-recognized system to prove the authenticity of a diamond and provide a reliable and correct diamond identity and level. 5, European Gemological Institute - EGL Diamond Grade Certificate Founded in 1974, EGL's clients focus on professional wholesalers, retailers and cutting factories, with the mission of helping consumers buy diamonds and precious stones. EGL identification in the United States and Belgium has a certain professional status and popularity. The certificate issued by it is sufficient to provide all the information about the diamond, including the physical properties of the diamond's weight, color, clarity, size, etc., for industry and consumer reference. In 2008, EGL established an independent third-party diamond identification laboratory in Hong Kong, named EGLAsia, to provide safer and faster diamond identification services for Asian diamond customers. 6. National Jewelry Quality Supervision and Inspection Center - NGTC Diamond Classification Certificate The National Jewelry Quality Supervision and Inspection Center (referred to as the Inspection Center) is a national-level jewellery and jade professional quality inspection agency authorized by the relevant state authorities. It is the authority of Chinese jewelry and jade detection. The diamond grading system used in the national inspection also follows the international practice according to the cut, color and clarity of the diamond. Cotton Ladies Blouse,Ladies Blouse,Custom Blouse,Print Blouse SHAOXING OSTAR APPAREL CO., LTD. , https://www.ostarappale.com