A distinctive heritage Our mission is to provide a premium grading service and proprietary equipment unique to the diamond industry. The De Beers Group of Companies, the organisation most closely associated with the mystique and science of diamonds, established The International Institute of Diamond Grading & Research (IIDGR) in 2008. Since then, we have remained true to our vision of providing premium services and ensuring we are contributing to the industry by preserving the integrity of each diamond that passes through our global laboratories. OUR SERVICES World Class Laboratories Understand more about our processes and global laboratories. Grading Services FIND OUT MORE Melee Testing FIND OUT MORE Table and Girdle Inscriptions FIND OUT MORE Diamonds FIND OUT MORE A De Beers Group Company The De Beers Group of Companies was established in 1888. They are the world’s leading diamond company, with unrivalled expertise across the entire diamond pipeline employing more than 20,000 people around the globe. VISIT DE BEERS WEBSITE Your first name* Your last name* Your company name* Your email* Your telephone number* Your message* Enter the captcha below* ↺ SEND MESSAGE Terms of Use Map Satellite Our Services Over 125 years of industry expertise ensures the quality of our service is the best in the business. GRADING Grading Reports A comprehensive study of a diamond’s carat weight, colour, clarity and cut with an accurate and to scale plotted diagram. FIND OUT MORE GRADING Diamond Sealing This service aims to further ensure the integrity of every diamond that leaves any of our global laboratories. FIND OUT MORE INNOVATION Detection Instruments We offer detection instruments that can readily screen out simulants synthetics and treated stones. FIND OUT MORE Enquiry Form If you are interested in any of our services please submit your details and we will get in touch First Name* Last Name* Service Type* Select Melee Testing Grading Services Instruments Email* Enter the captcha below* ↺ SUBMIT Innovation Services Grading Diamonds About Terms & Conditions Privacy & Cookie Policy © International Institute of Diamond Grading & Research 2012-2016 A De Beers Group Company