A GRA moissanite certificate is a small grading card or report that commonly comes with moissanite. It lists the stone's stated shape, measurements, weight, color, clarity and cut, usually with a report number you can look up. It's useful as a record of what the seller says you're getting. It is not a GIA report, it isn't an independent lab grading of GIA's standing, and it isn't an appraisal of the stone's value.

That's the core of it. Below is how to read one, how report numbers and laser inscriptions work, and how to use the card sensibly.

What GRA is (and why it's not GIA)

GRA reports are widely issued across the moissanite trade, and they're typically requested by the suppliers and sellers of the stones. If you've shopped for moissanite online, you've almost certainly seen the cards: credit-card-sized, with a photo of a stone and a list of grades.

The letters cause a lot of confusion. GIA, the Gemological Institute of America, is an independent lab known for grading diamonds, and IGI is another lab widely used for diamonds and lab-grown diamonds. GRA is not affiliated with GIA, and a GRA card shouldn't be read as carrying the same weight. Major diamond labs identify moissanite, but they don't issue color and clarity grades for it the way they do for diamonds. That's part of why GRA-style cards became the norm for moissanite.

We can't speak for how every card is produced across the industry. What we can say is how to read one and what it's good for.

What's on a GRA card

Layouts vary, but a typical card includes:

• Report number, often with a QR code
• Shape and cut style, such as round brilliant or oval
• Measurements in millimeters
• Weight in carats
• Color grade, usually on the D-to-Z scale
• Clarity grade, such as VVS1
• Cut, polish and symmetry grades
• A photo of a stone and sometimes a date

How to read it, field by field

A note on carats. Moissanite is less dense than diamond (about 3.21 g/cm³ vs about 3.52), so a moissanite the same size as a 1 carat diamond weighs a little less, roughly 0.85–0.9 carat for a 6.5 mm round. Sellers usually describe moissanite by diamond equivalent weight (DEW), the diamond weight it matches in size. That's how our listings work: "1ct (6.5mm)" means a stone the size of a 1 carat diamond. When you're comparing, trust the millimeter measurement most. Our moissanite carat size chart shows the common sizes.

For what grades like D and VVS1 actually mean, and how much they matter at different sizes, see our guide to moissanite color and clarity grades.

What a GRA certificate isn't

Being clear about the limits makes the card more useful, not less:

• It isn't a GIA or IGI report. It's a separate document, and its grades are best understood as the stone's stated grades.
• It isn't an appraisal. It doesn't state a retail, replacement or insurance value. If you want to insure a piece, ask an independent appraiser, and make sure the appraisal names the stone as lab-created moissanite.
• It isn't proof on its own that the card belongs to your stone. An online lookup confirms the report record exists. Matching that record to the stone in your hand takes measurements, an inscription check, or a jeweler.
• It isn't an investment document. Moissanite is a beautiful, durable gemstone to wear and enjoy, not something to buy for resale.

Report numbers, lookups and laser inscriptions

Most GRA cards carry a report number, and many include a QR code that opens an online record. When you check one, compare the record with both the card and your stone: shape, measurements and grades should all line up.

Some moissanite also has a tiny report number laser-inscribed on the girdle, the thin outer edge of the stone. It's far too small to read with the naked eye; you'll need a 10x loupe or a jeweler's microscope, and in a closed or bezel setting it may be hidden. If your stone has an inscription and it matches the card and the online record, that's a good consistency check.

Paperwork is never the final word, though. Inscriptions can be faked: GIA has published a lab note about a synthetic moissanite inscribed with a number copied from a natural diamond's GIA report. That's a reminder that identifying a stone comes down to examining the stone itself. A thermal tester, a multi-tester and a gemologist's loupe tell you what you have; our article on whether moissanite passes a diamond tester explains what each one shows.

Questions worth asking about any GRA card

Whether you're buying from us or anyone else, a few questions help you get the most out of a certificate:

• Is the card for this specific stone? A card that describes the exact stone in your piece is more useful than a generic one for the style.
• Is the weight actual or diamond-equivalent? Sellers handle this differently, so ask if the carat figure and the millimeter size don't seem to match what you expect.
• Do the measurements match the listing? The millimeter size on the card should agree with the size you ordered, within normal tolerances.
• Is the stone inscribed? If it is, you or a jeweler can check that the number matches the card.
• What does the card not cover? A GRA card describes the stone only. It says nothing about the metal, the plating, or how well the stone is set. For our pieces, the metal is 925 sterling silver, most often plated in gold or rhodium, and that's stated on each product page, not on the certificate.

A seller who answers these plainly is giving you a good sign about how they describe the rest of their jewelry.

Why the card is still worth having

A GRA certificate does several useful things:

1. It documents the promise. You have the stated size and grades in writing, which you can compare against the listing.
2. It helps you describe your stone. If you ever need a repair or resizing, a jeweler appreciates knowing the stone is moissanite and its measurements. (Moissanite can also react temporarily to a jeweler's torch, so it's worth mentioning.)
3. It supports clear labeling. A card that names the stone as moissanite reinforces that it's sold as what it is, which matters to us. See our explainer on whether moissanite is real for more on the terms.

Keep the card with the jewelry box, and take a photo of both sides for your records.

Our GRA certificates

Eligible items in our store come with a GRA moissanite certificate. If having a certificate matters for a particular piece, email service@furmanluxury.com before ordering and we'll confirm it for you. Keep the certificate with the original packaging: if you return an eligible item within our 14-day window, it needs to come back unworn with its packaging and certificate. The details are in our return policy.

Solitaire pieces where the center stone takes the spotlight

Certificates are most meaningful for a single, prominent stone. The Timeless Round-Cut Necklace features one round moissanite in 5, 6.5 or 8 mm, the Floré Magen pendant centers a 1 carat diamond-equivalent stone, and The Signature Ring sets a 2 ct (8 mm) round center on a pavé band. You'll find more single-stone designs in our Timeless Classics collection.