What Is Moissanite? Silicon Carbide, Fire & Hardness
Moissanite is its own gemstone — silicon carbide, with a look and toughness that actually make a lot of sense for body jewelry. It's also one of the most misunderstood stones out there, mostly because people keep describing it by what it reminds them of instead of what it actually is.
So let's just talk about the stone itself.
What Moissanite Is
Chemically, moissanite is silicon carbide — one silicon atom locked to one carbon atom in a crystal lattice. That's the whole story. It's not glass, it's not a coating, and it's not some treated version of another stone.
Two numbers basically define how it behaves:
- Refractive index 2.65–2.69. This is how strongly the stone bends light that passes through it. A high number means light gets bounced around inside instead of shooting straight through — that's what creates the brilliance.
- Mohs hardness 9.25. The scale tops out at 10. At 9.25, moissanite shrugs off almost everything it meets in daily life.
It's also doubly refractive, which means light that enters the stone splits into two paths. Pair that with the high refractive index and you get the strong dispersion — those flashes of colored light people call fire. That's the stone's signature look, and it comes from the material itself, not from a special cut or any treatment.
Where It Came From
In 1893, French chemist Henri Moissan was studying fragments from the Canyon Diablo meteorite crater in Arizona when he found these glittering crystals. He thought they were something else at first. Later analysis showed they were silicon carbide. In 1905 the mineralogist George Frederick Kunz named the mineral moissanite after him.
Natural moissanite is genuinely rare — tiny amounts show up in certain meteorites and a handful of unusual rock formations, but the crystals are too small and too scarce to ever cut into jewelry. Every gem-quality moissanite sold today is lab-created. Commercial production of jewelry-grade material started in the late 1990s.
That's not a compromise. It's simply the only way the stone exists at a size you can actually wear, and the lab process gives consistent, predictable optical properties. We talk more about where moissanite sits in the bigger picture of body jewelry materials in our history of body jewelry materials.
Why It Works for Body Jewelry
Body jewelry is harder on a stone than a ring is. The pieces are small, they're on you all the time, they get knocked, slept on, tangled in hair, and cleaned over and over.
Hardness is the biggest reason it works. At Mohs 9.25, moissanite can handle that lifestyle. Softer stones slowly pick up fine scratches that scatter light instead of reflecting it, so they start looking cloudy even after a good cleaning. That's a durability issue, not a dirt one — we dig into it more in our comparison of opal vs CZ piercing ends.
Small stones get the most out of a high refractive index. A 2mm stone doesn't have much surface area to work with. The more efficiently it returns light, the more it actually looks like a gem instead of a tiny dot. That's why the fire matters even more at body-jewelry scale than it does in a big center stone.
It also plays nicely with low-profile settings. Bezel and prong settings on flat-back studs keep the stone close to the skin, which is what you want for comfort and for not catching on everything. Moissanite's brightness means even a low setting still shows up clearly.
Sizes and Carat Weight
Body jewelry is measured by millimeter diameter, not carat, because what actually matters is how the piece sits on your ear. For reference:
| Stone size | Approx. carat |
|---|---|
| 2mm | ~0.03 ct |
| 2.5mm | ~0.06 ct |
| 3mm | ~0.11 ct |
| 4mm | ~0.25 ct |
For hoops, total carat weight depends on the gauge and diameter — check the individual listing.
Most people land in the 2mm to 3mm range for lobes and helixes. It's intentional without dominating. Bigger sizes work too, they just sit a little higher off the skin.
Grading: D Color, VVS Clarity
Moissanite is graded on the same scales used for other colorless stones.
D color is the top of the colorless range — no visible tint. VVS clarity means very, very slightly included: any internal characteristics are hard to spot even under magnification, and completely invisible at the sizes we use in body jewelry.
At 2–4mm you honestly can't tell the difference by eye. The grades still matter because they mean the material is consistent — you're not ending up with one stone that looks a little yellow next to the one in your other ear.
Caring for It
Pretty straightforward, since the stone is both hard and chemically stable.
- Warm water, mild soap, soft brush, rinse, dry. That's the whole routine.
- Skip ultrasonic cleaners on anything with glued components. Mechanically set bezels and prongs are usually fine, but double-check first.
- Store pieces separately so harder items don't rub against the settings. Our guide to storing piercing jewelry covers the details.
- The setting will wear before the stone does, so give the prongs a quick look every now and then.
A Note on Terminology
Moissanite gets described in a lot of ways that miss the mark. It isn't a simulant of something else, it isn't a lab-grown version of another stone, and it isn't a substitute. It's silicon carbide — a distinct material with its own properties.
The cleanest way to talk about it is with its own numbers: refractive index 2.65–2.69, Mohs 9.25, noticeable fire, lab-created. Anything that frames it as a stand-in for a different gemstone both undersells it and describes it inaccurately at the same time.
Moissanite at VP
Our moissanite pieces are set in implant-grade titanium, so the same metal rules that apply to any healing piercing still apply here: implant-grade titanium, solid 14K or 18K gold, or niobium. The stone doesn't change what the metal needs to be — see titanium vs surgical steel.
One thing worth checking before you order: some pieces are tops only and need a separate labret post, while others are complete studs. The listing will say which. If you're new to threadless, our guide to the threadless system walks through how the two parts fit together.
Browse the moissanite collection, or our wider implant-grade titanium range. Listed prices are starting points — they change with size and setting.
Frequently Asked Questions
What is moissanite made of?
Silicon carbide — silicon and carbon in a crystal lattice. It's a distinct mineral, not a coating, treatment, or imitation of another stone.
Is moissanite a real gemstone?
Yes. It occurs naturally, but only in tiny amounts in meteorites and a few rare geological spots — far too small and scarce for jewelry. All gem-quality moissanite is lab-created, which is the only way it exists at a wearable size.
How hard is moissanite?
9.25 on the Mohs scale (which goes to 10). That's hard enough to resist everyday scratching, which is why it keeps its brightness longer than softer stones.
What gives moissanite its fire?
A refractive index of 2.65–2.69 plus double refraction. Light enters the stone, splits, and bounces around inside instead of passing straight through. Those colored flashes are part of the material itself, not something added later.
Is lab-created moissanite lower quality?
No. Lab creation is simply how the stone is made at a size you can wear, and it produces consistent optical properties. Natural moissanite is more of a scientific curiosity than a jewelry material.
What size moissanite should I get for a lobe or helix?
Most people find 2mm to 3mm hits the sweet spot — visible and intentional without sitting high off the skin. For reference, 2mm is about 0.03ct and 3mm is around 0.11ct. Body jewelry is sized by millimeter because how it sits matters more than the carat number.
How do I clean moissanite jewelry?
Warm water, mild soap, a soft brush, then rinse and dry. The stone is hard and chemically stable, so nothing fancy is required. Just check before putting anything with glued components in an ultrasonic cleaner.
Can I wear moissanite in a healing piercing?
What matters for a healing piercing is the metal, not the stone. Stick with implant-grade titanium, solid 14K or 18K gold, or niobium — the same rules as any other jewelry. Ask your piercer what they recommend for your specific placement and stage of healing.
This article is for general information only and is not medical advice. Healing times and individual responses vary from person to person. If you are experiencing irritation, redness, or discharge from a piercing, consult a reputable professional piercer or a qualified healthcare provider.