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Certification

IGI certification, explained plainly.

An IGI report is an independent laboratory document that records a diamond's 4Cs and states laboratory-grown origin when applicable. It is not a brand warranty and it is not a price guarantee — it is a description you can verify.

By Jeevan Kumar, founder of OUVRA · Updated 16 October 2026

Verify a report or hallmark

What is IGI certification?

IGI (International Gemological Institute) grades diamonds and issues reports. For a lab grown diamond the report typically records shape, carat weight, colour, clarity, cut grade where applicable, measurements and the laboratory-grown origin.

OUVRA supplies an SGL or IGI certificate with every diamond. Which laboratory is used depends on the stone; both are independent of the jewellery house.

What the report is — and is not

It is a graded description of one stone at the time of examination. It is not proof that a jeweller's price is fair, and it does not replace checking the gold hallmark on the finished piece.

Always match the report number, measurements and grades to the diamond you are buying. For inscribed stones, a jeweller can help locate the girdle inscription under magnification.

How to verify a diamond certificate

Use the issuing laboratory's official verification page — for IGI, enter the report number or scan the QR code on the document. Compare every returned field with the paper or PDF you were given.

For SGL reports, use SGL's official report search. For the gold, use the BIS Care app and the jewellery's HUID. OUVRA's verify guide walks through all three checks.

Verify a report or hallmarkLab grown vs naturalPrice a certified stone

Frequently asked

Straight answers.

What is IGI certification?

IGI certification is an independent laboratory report that grades a diamond on the 4Cs and, for lab grown stones, states laboratory-grown origin. It describes the stone; it does not set the jewellery price.

How do I verify a diamond certificate?

Open the issuing laboratory's official verification tool, enter the report number, and compare the online result with your document. Then check gold purity separately via the BIS Care app using the HUID.

Does OUVRA use IGI or SGL?

Every OUVRA diamond is supplied with an SGL or IGI certificate. The laboratory depends on the stone selected for the piece.

Is an IGI report enough on its own?

It confirms a report exists for those grades. Also compare measurements to the physical stone, and verify the gold hallmark on the finished jewellery.

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