A customer walks into a boutique and asks to see the "GIA certificate" on a moissanite. The sales associate freezes, because the stone actually carries a GRA report. The boutique loses the sale not because the stone is bad, but because nobody explained which lab issues the report. Certificate confusion is one of the top reasons moissanite sales stall at the counter. Wholesale buyers who understand which labs actually issue moissanite reports can coach their retail accounts and close the sale.
This guide compares the labs that issue certificates on moissanite, explains what GIA does and does not grade, and tells you which report your retail accounts actually need.
GIA does not grade commercial moissanite
The Gemological Institute of America is the gold standard for diamond grading. Its 4Cs framework is taught worldwide. But GIA does not issue commercial grading reports for the vast majority of moissanite sold in the wholesale market. GIA will grade diamond, natural colored stones, and some gem materials, but moissanite sold through the B2B trade is graded by labs focused on the synthetic-gem supply chain: GRA, NGTC, and a handful of smaller labs. If a supplier advertises a "GIA moissanite certificate," that is almost always a marketing claim, not a real GIA report.
The Wikipedia moissanite entry notes that synthetic moissanite was first commercialized as a diamond simulant, and the certificate market around it has grown up separately from diamond grading.
What GRA actually is
GRA (Gem Research Association) is the report most commonly attached to wholesale moissanite parcels. A GRA report lists the stone's shape, measurements, carat equivalent, color grade, clarity grade, cut grade, and a report number. You can verify the report number on the GRA portal. The report is not a diamond-grade GIA certificate, but for moissanite it is the standard buyers and retail accounts recognize. We walk through verification step by step in bulk parcel GRA verification, and what the report does and does not cover in GRA limits.
NGTC and other labs
NGTC (National Gemstone Testing Center) is a Chinese national lab that issues similar reports and is widely accepted in the domestic Chinese trade. IGI, profiled at igi.org, grades diamonds and lab-grown diamonds and occasionally grades moissanite for specific retail programs, but IGI moissanite reports are rare in wholesale parcels. For most buyers, GRA is the default; NGTC is acceptable; IGI is a bonus, not a requirement.
Spotting a forged report
Fake GRA reports are rare but exist. Real GRA reports carry a hologram, a QR code that opens the portal record, and a report number laser-inscribed on the stone girdle. Hold the stone under 10x and look for the micro-inscription; if the report number is not on the girdle, ask the supplier why. The report card should also match the portal on carat equivalent, measurements, and grade. A mismatch on any one of these three is a reject. We walk through the full check in bulk parcel verification.
What to tell your retail accounts
The cleanest script is: "Moissanite is not a diamond, so it is not GIA-graded the way a diamond would be. It carries a GRA certificate specific to moissanite, and you can verify the report number online." This heads off the customer who expects a GIA slip and builds trust. Our piece on retail positioning vs simulants has more scripts for the sales floor.
What the certificate does not cover
A GRA certificate grades the stone as it leaves the factory. It does not grade the setting, the post, the clasp, or the craftsmanship of the finished piece. It also does not guarantee against chipping in wear. Wholesale buyers should read the certificate as a stone passport, not as a finished-jewelry quality document. If a retail customer asks whether the certificate covers the whole ring, the answer is no; the stone is certified, the setting is the bench shop warranty.
Is a GRA certificate as good as a GIA one?
They are not comparable because they cover different materials. GIA is the diamond gold standard; GRA is the moissanite industry standard. Compare GRA to other moissanite labs, not to GIA.
Can I get a GIA report on my moissanite?
Not as a standard commercial product. If you need an independent lab opinion for a specific high-value stone, ask GIA directly about custom gem identification, but expect a long turnaround and a fee.
How do I verify a GRA report number?
Enter the report number on the GRA portal. The measurements and weight should match the physical stone within rounding. If the portal does not return the number, the report is forged.
Should I pay extra for IGI-graded moissanite?
Only if your retail account specifically asks. For most bridal buyers, GRA is sufficient and saves $5-$15 per stone.
Order from HOLYCOME. Every stone ships with a verifiable GRA certificate, and we include a printed verification card for your retail accounts. We can also supply NGTC reports on request for the Chinese domestic market. Apply for a wholesale account and request the current certified price list — minimum order 20 stones.
