Certificate guide
Where to verify a grading report, and what to check before you pay. Always match the report number laser-inscribed on the girdle.
| Lab | Verify a report |
|---|---|
| GIA, Gemological Institute of America | gia.edu report check |
| IGI, International Gemological Institute | igi.org verify |
| HRD Antwerp | hrdantwerp.com |
Check these four things
- Report number. Enter it on the lab's own site, not a link sent by the seller.
- Girdle inscription. Under a 10× loupe it should match the report number.
- Origin. The report states natural or laboratory-grown, and any treatment.
- Measurements. Length, width and depth on the report should match the stone you are offered.