About IDI

Independent grading for loose diamonds.

Every stone we examine is identified, measured and graded, and its report is recorded under a unique number that anyone can verify online.

Verify a report

What we do

A clear, documented record of every stone.

Our reports describe a diamond's identity and quality in standard trade terms, so buyers and sellers can rely on the same information.

Identification

Each stone is examined to determine whether it is a natural or laboratory-grown diamond.

Grading

Shape, carat weight, colour, clarity, fluorescence, polish and symmetry are assessed and documented.

Inscription

The report number can be inscribed on the girdle, linking the stone to its report.

Verify a report

Check any IDI report in seconds.

Find the numberIt is printed on the report card and may be inscribed on the stone's girdle.
Scan or enter itScan the QR code on the card, or type the number on our verification page.
Compare the detailsMake sure the stone matches the report shown on this website.
Go to verification