Is Moissanite Real? A Straight Answer, and What to Say When Someone Asks

Yes. Moissanite is real. It is a naturally occurring mineral with its own chemical formula, its own crystal structure and its own entry in every gemological reference on the shelf. The question “is moissanite real” usually means something narrower though, and it is worth answering the narrow version too: it is not glass, it is not plastic, it is not a coating over something cheap, and it is not pretending to be another stone.

If you are here because someone looked at your chain and made a face, skip to the last section. If you want to actually understand what you are wearing, start at the top.

What is moissanite made of?

Moissanite is silicon carbide. One silicon atom bonded to one carbon atom, repeating in a tight hexagonal lattice.

That lattice is the whole story. It is what makes the stone hard, what makes it handle heat, and what makes light behave strangely once it gets inside. Silicon carbide has a refractive index of 2.65, which is high enough that light entering the stone slows down, bends hard, and bounces around inside before it leaves. What you see on the outside is the result of light taking a longer path than it wanted to.

The other number worth knowing is dispersion, 0.104. Dispersion measures how much a stone splits white light into its component colours. That is why moissanite throws flashes of orange, blue and green rather than pure white sparkle. People call it fire. It is just physics, running at a level most gemstones cannot reach.

Is moissanite a real gemstone, or a man made material?

Both, and the two are not in conflict.

Moissanite was found in 1893 by Henri Moissan, a French chemist who later won the Nobel Prize, while he was examining rock fragments from a meteorite crater in Arizona. He thought he had found something else at first. It took him years of further analysis to correctly identify the crystals as silicon carbide, and the mineral was named after him.

The catch is that natural moissanite is astonishingly rare. It occurs in meteorites and in a handful of specific geological formations, in fragments too small to cut. There is not enough of it on this planet to make jewelry from. So the stone you buy is grown in a lab, and it is grown to the exact same atomic structure Moissan identified in that crater.

This is where people get stuck, so it is worth being direct: lab grown does not mean imitation. Lab grown means the same material, made deliberately instead of waiting a few million years. A lab grown emerald is an emerald. A lab grown sapphire is a sapphire. A lab grown moissanite is moissanite, chemically identical to the meteorite fragments in Moissan’s samples, and identical the way a snowflake made in a freezer is still ice.

An imitation would be a different material shaped to look like the original. Cubic zirconia is a different material. Glass is a different material. Moissanite is moissanite.

Is moissanite the same thing as a diamond?

No, and it never was.

Diamond is pure carbon. Moissanite is silicon carbide. They are two different minerals with different chemistry, different optical behavior and different personalities in light. Neither one is a version of the other.

The reason this question comes up constantly is that the jewelry industry spent decades filing moissanite under “diamond alternatives,” which framed an entire mineral as something you settle for. That framing was a marketing decision, not a gemological one, and it stuck.

We do not use it. Moissanite throws fire like nothing else in its price class, and it looks like itself. If you want a diamond, buy a diamond. If you want this stone, buy it on purpose, which is the only reason worth buying anything.

How can you tell if moissanite is real?

Four things a real stone does, and a fake will fail at least one.

It throws coloured fire, not just white glitter. Take it into direct sunlight and rock it slowly. You should see distinct flashes of orange, green and blue moving across the facets. Glass and most cheap simulants give you a flat white shimmer with no colour separation.

It does not scratch. Moissanite sits at 9.25 on the Mohs hardness scale. Almost nothing you encounter day to day can mark it. If a stone in a piece you own has picked up visible surface scratches after a few months of normal wear, it is not moissanite.

The edges stay sharp. Look at where two facets meet, under a phone camera at maximum zoom if you have to. On a properly cut moissanite the junction is a crisp line. On molded glass or a worn simulant it is soft and rounded.

It is set, not glued. This is the one that separates real jewelry from costume jewelry regardless of the stone. Every stone in a real iced piece sits in metal that has been physically closed around it, a prong, a bezel or a channel. Look at the back of the piece. You should see the underside of the stone through an open gallery. If the back is solid metal with no openings, the stones are sitting in glue, and glue lets go.

If you want certainty rather than a field test, a jeweler with a refractometer can identify silicon carbide in about ten seconds. It is not a difficult stone to confirm.

Does moissanite hold up over time?

It holds up better than most things you own.

At 9.25 on the Mohs scale, moissanite is harder than sapphire, harder than emerald, harder than every simulant it gets grouped with. In practical terms that means it does not scratch against keys, zips, countertops or the inside of a car door. It also has high thermal stability, which is why jewelers can work near it without pulling stones.

It does not cloud. This is a persistent myth and it comes from cubic zirconia, which genuinely does go milky over a couple of years as the surface micro abrades. Moissanite has no equivalent failure mode. A moissanite stone in ten years is a moissanite stone that needs cleaning, not replacing.

What can fail is the setting and the metal around it, which is why the metal matters as much as the stone. Every Amison piece is built on solid 925 sterling silver, not plated brass, and the stones are hand set rather than glued. A plated base metal chain will wear through to the copper underneath in weeks and take the whole piece down with it, no matter how good the stones are.

What to say when someone says “that’s fake”

This is the actual reason most people search this question, so here is the useful part.

You do not need to argue. You need one sentence that ends the conversation, and it works because it is true.

“It’s moissanite. It’s a real stone, it’s just not a diamond.”

That is it. The reason it lands is that it refuses the frame. The person saying “that’s fake” is assuming you were trying to pass something off and got caught. The moment you name the stone confidently, without defending or explaining, the assumption collapses. They were expecting embarrassment. You gave them a fact.

If they push, you have three more:

• “Different stone. Silicon carbide, not carbon.” Specific enough that it is obviously not something you made up.
• “Look at it in the sun and tell me that’s glass.” Hand it over. The stone does the rest.
• “It came out of a meteorite crater in 1893. Look it up.” True, memorable, and it turns the conversation into something interesting instead of something defensive.

The thing that gets you called out is not the stone. It is hesitation. Nobody questions someone who clearly knows exactly what they are wearing and paid for it deliberately. The flex is knowing, not pretending.

What Amison uses, specifically

Every stone we set is D colour moissanite, the top of the colourless range, hand set in solid 925 sterling silver. No plated base metal, no glued stones, no vague “diamond simulant” language on any product page, because that phrase describes something we do not sell.

If you want to see it work, the moissanite tennis chain is the piece that shows the fire most clearly, because every stone sits in its own four claw basket with light reaching it from underneath. The moissanite cuban chain is the heavier build, six through fifteen millimetres. And the moissanite cross pendant is the entry point most people start with, seven builds from a slim everyday piece up to a crowned baguette.

All of it ships free in the US with a 12 month warranty, because a stone this durable should come with a company willing to stand behind the setting around it.

Frequently asked questions

Is moissanite a real gemstone?

Yes. Moissanite is silicon carbide, a naturally occurring mineral first identified in 1893 in meteorite fragments. Because natural deposits are too rare and too small to cut, the moissanite used in jewelry is lab grown to the same atomic structure.

Is lab grown moissanite still real moissanite?

Yes. Lab grown moissanite is chemically and structurally identical to natural moissanite. Growing it in a lab changes where it came from, not what it is.

Does moissanite lose its sparkle over time?

No. Moissanite does not cloud or dull. That failure belongs to cubic zirconia, which micro abrades at the surface. Moissanite only needs occasional cleaning with warm water and mild soap.

How hard is moissanite?

It rates 9.25 on the Mohs hardness scale, harder than sapphire and emerald. It resists scratching from everyday contact with keys, zips and hard surfaces.

Can you tell moissanite apart from other stones by eye?

Often, yes. Moissanite throws distinct flashes of orange, green and blue in direct light because of its high dispersion. Most simulants produce flat white sparkle with no colour separation.

Will a moissanite chain turn my neck green?

Not if the metal underneath is solid. Green skin comes from copper or brass base metal showing through worn plating, not from the stones. Solid 925 sterling silver has no reactive base metal to wear through to.