International Institute of Diamond Grading and Research
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The International Institute of Diamond Grading & Research, established by The De Beers Group of Companies to bring diamond grading into the 21st Century.
(19)
Address
20 Carlton House Terrace
London
SW1Y5A
Opening Hours
| Monday | 9am - 5pm |
| Tuesday | 9am - 5pm |
| Wednesday | 9am - 5pm |
| Thursday | 9am - 5pm |
| Friday | 9am - 5pm |
Telephone
Website
Products
Full Diamond Grading Service
Dossier Grading Service
Automated Melee Screening
Diamond Verification Instruments
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