Moissanite vs
lab-grown diamond
They look almost identical in a ring. Both are grown in a lab. Both come with a certificate. But they are fundamentally different stones. Knowing the difference helps you choose with confidence.
Chemically identical
to a mined diamond
A lab-grown diamond is pure carbon: the same crystal structure, the same hardness (10 on the Mohs scale), the same optical properties as a diamond pulled from the earth. The only difference is origin: a controlled laboratory environment rather than a mine.
Every Brilliani lab-grown diamond is certified by the IGI, one of the world’s leading independent gemological institutes. The certificate travels with your order.
A stone with
its own identity
Moissanite is not a diamond alternative. It is a distinct stone. Originally discovered in a meteorite crater in 1893, it is now produced in laboratories from silicon carbide. It sits at 9.25 on the Mohs scale and has a refractive index slightly higher than diamond, giving it exceptional brilliance with a distinctive colourful fire.
Every Brilliani moissanite carries a GRA certificate confirming its authenticity and grade.
“Both stones are Born Clear: lab-grown, certified, and transparently priced. The difference is in the stone itself.”
| Moissanite | Lab-grown diamond | |
|---|---|---|
| Composition | Silicon carbide (SiC) | Pure carbon (C) |
| Hardness | 9.25 Mohs | 10 Mohs |
| Brilliance | Very high (more colourful fire) | High (classic white brilliance) |
| Certification | GRA | IGI |
| Price | Lower | Higher |
| Origin | Laboratory | Laboratory |
You want maximum brilliance at an honest price
Moissanite has its own character: a slightly warmer, more colourful fire than diamond. If you appreciate a stone with a distinct identity, and want certified quality at a lower price point, moissanite is the right choice.
GRA-certified, Born ClearYou want a stone that is, legally and chemically, a diamond
A lab-grown diamond is indistinguishable from a mined stone under any conditions. If that matters to you, whether for sentimental, practical or personal reasons, the lab-grown diamond is your stone.
IGI-certified, Born ClearWe don’t sell
uncertified stones
Every moissanite comes with a GRA certificate. Every lab-grown diamond comes with an IGI certificate. The certificate is included with your order. You can verify it independently. That’s the point.