The International Institute of Diamond Grading & Research
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.
- +44 (0) 20 7858 7887
- 17 Charterhouse Street
London, EC1N 6RA
United Kingdom
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