Updated October 2026: we now buy certified diamonds of 1.5 carats and up only (GIA, IGI, AGS, or HRD reports), and no lab-grown stones.
A diamond of 1.5 carats or more is a significant asset, and a grading certificate makes it far easier to sell at a fair price. The certificate removes the guesswork: instead of taking a buyer's word on quality, you have an independent grading report that documents exactly what your stone is. This guide explains how that translates into your payout.
We buy certified diamonds across our Northern Virginia stores, and a credible certificate consistently leads to a stronger, faster offer because both sides are working from the same objective facts.
Why GIA certification matters
The Gemological Institute of America is the most respected diamond grading authority in the world. A GIA report documents your diamond's exact characteristics, which means:
- No quality disputes. The grade is independent and verifiable.
- A stronger resale market. Certified stones are easier for a buyer to resell, so they can pay more.
- Faster appraisals. The report confirms what the buyer would otherwise have to establish from scratch.
If your diamond is 1.5 carats or more and certified by GIA, IGI, AGS, or HRD, bring the report. It directly supports a higher, faster offer.
GIA versus other grading labs
Not all certificates carry the same weight. We accept reports from GIA, IGI, AGS, and HRD, and evaluate the stone on the 4Cs exactly as the certificate states. Reports from labs outside that list (certain EGL grades, for example) are often graded more loosely, and we don't buy stones certified only by labs we don't recognize.
Natural versus lab-grown diamonds
This distinction now matters enormously to your payout. Natural diamonds hold meaningful resale value. Lab-grown diamonds, though physically and chemically similar, have fallen dramatically in price as production has scaled, and they resell for only a small fraction of their original retail cost. A GIA report states plainly whether a stone is natural or laboratory-grown, which is one more reason certification helps: it settles the single biggest value question up front. We don't buy lab-grown diamonds. If you're not sure which you have, call us before you come in.
The 4 Cs and your payout
A diamond's value is driven by the four characteristics a GIA report grades:
- Carat. Weight. Value rises sharply with size, especially above one and two carats.
- Cut. How well the stone is cut, which governs its brilliance. Often the biggest driver of beauty and price.
- Color. Graded from colorless (most valuable) down the scale.
- Clarity. The presence of inclusions, from flawless down to visible.
Two one-carat diamonds can be worth very different amounts depending on these grades, which is exactly why an independent certificate is so valuable when you sell.
How to sell a certified diamond well
- Bring the grading report (GIA, IGI, AGS, or HRD) and any original purchase paperwork.
- Do not remove the stone from its setting before an appraisal; let the buyer advise.
- Have it appraised in person, never mailed away, so you keep the stone until you accept.
- Choose a buyer who reads and verifies the certificate and explains the offer against current market values.
A diamond's value is separate from any gold or platinum in its setting. If the piece is also designer or contains significant precious metal, that is appraised on top of the stone.
Where to sell certified diamonds
Cash for Gold VA buys certified diamonds of 1.5 carats and up (GIA, IGI, AGS, or HRD) at our Northern Virginia stores. Chantilly, Annandale, and Manassas take walk-ins during store hours; Vienna / Tysons is currently by appointment, so call (703) 889-0532 before you go. Every store offers free, no-obligation appraisals, and accepted offers are paid by check on the spot.
Frequently asked questions
Which diamonds do you buy? Loose certified diamonds of 1.5 carats and above with a GIA, IGI, AGS, or HRD report, priced on the certified grade and current market values. We don't buy diamonds under 1.5 carats, uncertified stones, or lab-grown diamonds.
Why does a grading certificate increase my offer? It independently documents your diamond's quality, which removes uncertainty and makes the stone easier to resell, so a buyer can pay more and faster.
What if my diamond isn't certified? We only buy certified diamonds. If an uncertified stone is set in gold or platinum, we can still buy the metal: we deduct the stone's estimated weight and hand the stone back to you if you accept.
Is the setting valued too? Yes. Any gold or platinum and any designer value in the setting is appraised in addition to the diamond.
Selling a certified diamond of 1.5 carats or more? Visit a store for a free, no-obligation appraisal.
