GIA · IGI · HRD Antwerp

Sell a GIA certified diamond

A GIA report gives a buyer an independent, verifiable description of your diamond. Enter the report number and upload a copy, and a specialist will review the stone and paperwork together.

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An independent report makes the conversation clearer.

The Gemological Institute of America (GIA) grades diamonds to a widely recognised standard. A GIA report records the carat weight, colour grade, clarity grade, cut grade for round brilliants, polish, symmetry, fluorescence and measurements, and usually includes a plotted diagram of the stone's inclusions.

Because the report is independent, it lets a buyer give you a more considered initial response before seeing the stone. It does not replace the physical examination: every offer is confirmed after we have checked that the diamond in hand is the one described in the report.

Free diamond valuation

Tell us about
your diamond.

The more you can share, the more useful our first response. Only your name, contact details, postcode and item type are required.

Free, with no obligation
Direct purchase, no seller fees
Details reviewed privately

Prefer to talk? Call 01924 943540

Your diamond

Item typeShape

Carat weightMain stone, if knownColour

ClarityMetal

CertificateCertificate number

Receipt or box?Asking price (optional)Helps us understand your expectations

Photos and certificate Photos at least 1 required, up to 6 · JPG, PNG or WebPFace-up in daylight, each side, the inside of the band or backs, and any box. Large photos are resized for you.

Certificate photo or PDF, optional

Notes

Your details

Full nameEmail

PhonePostcode

What we check against your report

We compare the report number with any laser inscription on the girdle, check the measurements and weight, and compare the clarity characteristics with the plotted diagram. We also look for anything that has changed since grading, such as chips or abrasions from wear, or signs that a stone has been re-polished.

If a stone does not match its report, or has been damaged since grading, we explain what we found before any figure is finalised. You remain free to decline.

IGI, HRD and other laboratories

Reports from IGI (International Gemological Institute) and HRD Antwerp are also common, particularly for stones bought in the UK and Europe, and are welcome. Choose the laboratory in the form and enter the report number. Laboratories use different methods and terminology, so we always review the stone itself as well as the paperwork.

IGI also grades many laboratory-grown diamonds, and their reports state the origin of the stone. Please mention the origin in your notes if you know it.

Certified stones in rings and earrings

Many engagement rings and earrings come with a report for the centre stone or each stud. Use the form for the whole piece: choose the item type, add the report details for the main stone, and mention any additional reports in the notes. Please do not remove a stone from its setting to match it with a report.

Keep your original report safe

Upload a clear photo or PDF of every page of the report rather than posting the original before we have agreed a handover. If the report has been lost, the GIA report number can often still be read from the laser inscription during inspection.

Questions, answered

Before you
send it in.

Does a GIA report guarantee a particular price?

No. A report describes the stone; it does not set a price. Demand, condition, origin and current market conditions all play a part, and any offer is confirmed after inspection.

I have lost my GIA certificate. Can I still sell?

Yes. If the stone carries a laser inscription, the report number can usually be confirmed during inspection. Otherwise the stone is examined and tested in hand like any uncertified diamond.

Do you accept IGI and HRD reports?

Yes. Select the laboratory in the form and enter the report number. We review the stone as well as the report.

Should I re-certify an older GIA report?

Not usually before an enquiry. Tell us the report date and number and we will let you know if anything further would be helpful.

Can I sell a certified diamond that is still set in a ring?

Yes. Leave it in the setting, choose the item type in the form and include the report details for the centre stone.

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