IGI was established in Antwerp, Belgium. At first, it only did private diamond appraisal for several diamond families in Belgium. With the arrival of commercial times, the IGI certificate has been introduced to more and more consumers by the jewelers in the original high-end jewelry circle. Nowadays, many high-end jewelry collections of well-known brands such as Dior and Montblanc can see the IGI customization certificate. Stars like paris hilton also asked IGI to certify her pink diamond watch, which is related to the historical origin that IGI has been handed down. Like European custom-made women's wear, IGI provides customized certificates that can reflect the characteristics of products for senior customers. GIA is an American Gemological Institute, which can't be compared with IGI in the world. It can be said that GIA is the promoter of standardizing and popularizing the jewelry industry earlier, and its positioning has always been loyal to the middle class with the most consumer confidence and the largest number. Therefore, GIA has many fans in the United States, and the use of high-end jewelry in Europe is relatively small. GIA certificate emphasizes unity and has a sense of standardization like an assembly line. From the page of the certificate, the star's jewelry and the goods in the street shop all use the same plate making and design, and the American Gemological Institute meets the consumption needs of most people in modern industrialization.