01Decisive
Report number verifies online
Free and public on HRD's own service. A number that does not resolve or grades that differ from the printed document are decisive.
Lovenhall Diamond
Verify a HRD Antwerp report
Europe's laboratory, widely used in the trade and calibrated on its own terms.
Founded 1973Antwerp3 weighted checks
HRD Antwerp grades a large share of the stones moving through the European trade and its reports are widely accepted across the continent. Like every laboratory it is calibrated on its own terms, and HRD grades are not directly interchangeable with GIA's.
Verification is online and free. HRD also offers laser inscription, and where it has been applied the inscription ties the report to the stone.
For a buyer, the practical point is comparison. A stone with an HRD report and a stone with a GIA report at the same stated grades are not guaranteed to be the same stone, and the market prices that difference in.
The maker's own mark
Verifying an HRD report
HRD reports carry a number verifiable on the laboratory's own online service, returning the grades issued against it. Compare every printed field.
Where laser inscription has been applied, the girdle carries the report number and matching it is the check that defeats report swapping.
HRD reports state origin, and modern reports address laboratory-grown stones explicitly.
The checks
How HRD Antwerp is read
Ordered by how much each one settles. The decisive checks are the ones worth your first five minutes; the supporting ones only matter once those are clean.
02Strong
Inscription and measurements match the stone
Where an inscription was applied, match it. Where none was, match the millimetre dimensions and the table and depth percentages.
03Supporting
Grades read as HRD grades
HRD calibration is its own. Compare an HRD stone against another HRD stone, and treat a cross-laboratory comparison at identical stated grades with caution.
Questions we are asked
- How do I verify an HRD certificate?
- Enter the report number on HRD Antwerp's own free verification service and compare every grade against the printed report, then match the girdle inscription where one was applied.
- Is HRD the same as GIA?
- No. Both are established laboratories, but each is calibrated on its own terms and grades are not directly interchangeable. The market prices the difference, which is why cross-laboratory comparison at identical stated grades is misleading.
The other laboratories and houses the room reads
Free tools of the room
Lovenhall DiamondRead the stone itself
The checks tell you how it was made. The instrument tells you what it appears to be, and roughly what its kind fetches.
Open the Diamond IdentifierFree on iPhone & iPad. An estimate, never an appraisal.
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