Last updated: October 2026
By Jack Lv, General Manager — 925 sterling silver and GRA moissanite manufacturing in Foshan since 2011
Cubic zirconia is the correct stone below the point where a customer expects the piece to last, and moissanite is the correct stone everywhere above it. Moissanite is silicon carbide at 9.25 on the Mohs scale against cubic zirconia at 8 to 8.5, it keeps its polish and fire over years of normal wear instead of dulling, and it costs several times more per stone, so the decision is really about how the finished piece is going to be worn and priced.
No: cubic zirconia is zirconium dioxide and moissanite is silicon carbide, and although both are grown in a laboratory they are different materials. The difference shows up as hardness, as how much light the stone returns, and as how long it keeps its polish in wear.
Cubic zirconia, usually shortened to CZ, is zirconium dioxide (ZrO2). Moissanite is silicon carbide (SiC). Both are grown in a laboratory and both are white stones, but they are different materials with different hardness, different optics and different life expectancy in wear.
The optical difference is worth explaining to your own buyers in one line: moissanite has a higher refractive index than diamond, so it returns more light and shows more dispersion, while CZ has a lower refractive index than diamond and therefore looks flatter under the same light, especially after the surface has seen some wear.
| Property | Moissanite | Cubic zirconia (CZ) |
|---|---|---|
| Composition | Silicon carbide (SiC) | Zirconium dioxide (ZrO2) |
| Mohs hardness | 9.25 | 8 to 8.5 |
| Refractive index | Higher than diamond | Lower than diamond |
| Stone cost | Several times the CZ price | Lowest of the three white stones |
| Wear behaviour | Retains polish and fire under normal wear | Surface scratches accumulate and the stone dulls |
| Best placement | Main stone, daily-wear and gift pieces | Accents, trend and seasonal lines |
CZ sits at 8 to 8.5 on the Mohs scale and moissanite at 9.25, so a CZ stone worn daily collects surface scratches far sooner, and those scratches hold a film of hand cream and skin oil. What customers call a dead stone is usually that film sitting on abrasion, sometimes with plating wear on the setting around a stone that has not changed at all.
Hardness is the single best predictor here. CZ sits at 8 to 8.5 on the Mohs scale and moissanite at 9.25, so a CZ stone in a ring that is worn daily will show surface wear far sooner than a moissanite one of the same size and cut. A harder surface keeps its polish longer because fewer micro-scratches accumulate on the facets where light is supposed to reflect.
What customers describe as a cloudy or dead stone is usually three things at once: fine surface abrasion, a film of hand cream, soap and skin oils sitting on those scratches, and plating wear on the setting that exposes duller base metal around a stone that has not changed at all. That matters commercially, because the first two can sometimes be cleaned, while plating wear cannot.
There is no honest calendar answer for how long a CZ stone stays bright. It depends on the ring size, the setting, the climate, how often the piece is worn and what it is exposed to. What can be stated plainly is the ranking: moissanite holds its appearance longer than CZ, and in 925 silver the plating is often the first component to fail regardless of which stone sits above it.
Moissanite costs several times what CZ costs per stone, so a moissanite programme is priced by the stone as well as the metal, while a CZ programme is priced by metal, plating and design. Exact stone prices depend on size, cut, grade and quantity, so build the range from a costed sample rather than a list price.
Moissanite costs several times what CZ costs per stone, and that gap is the whole pricing architecture of a silver catalogue. A CZ programme is priced by the metal, the plating and the design, because the stone contributes very little to cost. A moissanite programme is priced by the stone as well as the setting, which is why it supports gift positioning rather than impulse positioning.
Exact stone prices depend on size, cut, grade and quantity, so use a costed sample rather than a list price when you build your range.
The complaints differ in kind rather than in volume: CZ complaints are about appearance over time, because the sparkle weakens and the surface scratches, which is the material behaving as expected. Moissanite complaints are about expectation, and clear material naming at the point of sale removes almost all of them.
The return pattern differs by stone, and it is predictable. CZ complaints cluster around appearance over time - the sparkle is weaker, the stone looks tired, the surface is scratched. These are not defects, they are the material behaving as expected, but they still generate support tickets and negative reviews, and they are hard to answer once the customer has decided the product was poor.
Moissanite complaints cluster around expectation. A customer who believed the stone was a diamond, and then learned it was not, feels misled even when the listing was accurate. Clear material naming at the point of sale removes almost all of that, which is why disclosure is a margin protection tool and not just a compliance task.
Treat it as a routine check rather than a suspicion, because substitution is the one risk that costs a wholesale buyer its reputation rather than its margin. Check the stone at goods-in against the agreed specification and keep the record, instead of relying on the supplier's description.
Substitution is the one risk that costs a wholesale buyer its reputation rather than its margin, and it is easy to reduce with routine checks.
Quantity, stone material and grade, plating, finish, packaging and the documents that ship with the goods, agreed before production rather than after. Stone checking is not left to the end of the line: four gates run from incoming material to pre-shipment, using XRF for metal content, a precision balance, calipers and magnification on the stones.
Nabest is a Foshan factory working in 925 sterling silver and VVS moissanite, so the specification you agree is the specification that goes to the bench. The practical terms to fix in writing are quantity, stone material and grade, plating, finish, packaging and the documents that ship with the goods.
Stone checking is not left to the end of the line. Four inspection gates run from incoming material through in-process work and final assembly to pre-shipment inspection, using an XRF spectrometer for metal content, a precision balance for weight, calipers for dimensions and magnification for stone and setting checks. Chemical compliance is documented with the REACH SVHC report BKC25020516BR issued by Shenzhen BKC Testing on 2025-02-27 covering 247 SVHC substances below 0.1 percent, and the RoHS and CE certificate HYC2025120053RV1 issued by Shenzhen HyCert on 2025-12-31 for its 27 listed models.
On lead times, sample pieces take 5 to 7 days and bulk production 15 to 20 days after approval, with quotations returned within 24 hours Monday to Saturday. The minimum for custom work is 10 pieces per design, or 30 for multi-stone settings, with 3 percent off at 50 pieces and 6 percent off at 100 pieces. Shipments can be arranged DDP or DDU from Foshan, and in-stock designs can be sent one piece at a time for dropshipping.
There is no fixed answer, because it depends on wear and exposure rather than time on a shelf. What can be said with confidence is the comparison: at 8 to 8.5 on the Mohs scale, CZ scratches more easily than moissanite at 9.25, so a CZ stone worn daily loses its surface polish noticeably sooner.
It depends on the price band you are selling into. Where the customer expects a lasting piece, the higher stone cost buys fewer appearance complaints and supports gift positioning. Where the piece is a cheap trend item that is expected to be replaced, CZ keeps the cost structure honest.
A basic thermal diamond tester will identify CZ as not-diamond, but it may also pass moissanite as diamond, so it cannot be used on its own to tell the two apart. A multi-tester that measures electrical conductivity is the practical instrument, because moissanite conducts and CZ does not.
Yes, and the same applies to moissanite. Name the material on the listing, the label and the invoice. Describing zirconium dioxide as diamond, or as moissanite, creates chargeback and platform risk on top of the reputational damage.
For studs and anything where two stones must look identical, moissanite is the safer choice because pairs stay matched in appearance as they age. CZ is fine for accents set behind the stone line or protected by metal, where the surface is not exposed to abrasion.
Send your design, size and quantity — factory quote back within 24 hours. Reference: General enquiry