What Is Moissanite?｜Brilliance to Rival Diamond & the GRA Report
A Brilliance to Rival Diamond — Moissanite
Lab-grown · Brilliance · GRA Certified · Collection
A brilliance that rivals a diamond — and, by some measures, surpasses it. Moissanite is a new generation of gemstone, grown in the laboratory. From what it really is, to how it differs from diamond, to the GRA report that comes with every stone — here is our guide, alongside the SMUK moissanite collection.
What Is Moissanite?
Found in a meteorite, grown in the lab
Moissanite is a gemstone made primarily of silicon carbide. It takes its name from the French chemist Henri Moissan, who discovered its crystals in a meteorite crater in 1893. Natural moissanite is exceedingly rare — found only in tiny amounts in meteorites and the like — so virtually all moissanite sold as jewellery today is lab-grown.
Being lab-grown does not mean lesser quality. Grown in a controlled environment, moissanite achieves high clarity and a consistent brilliance. It carries far less of the environmental impact of mining, and comes at a more accessible price — a sustainable, honest choice for a new era.
How It Differs from Diamond
Brilliance, hardness and price — each its own
Moissanite is known for a “fire” (dispersion) that is stronger than a diamond’s, scattering light into rainbow flashes. Its refractive index is high, too, so it sparkles all the more vividly in the light. It is also very hard — 9.25 on the Mohs scale (diamond is 10) — with plenty of durability for everyday wear.
Hardness Moissanite 9.25 / Diamond 10 (Mohs)
Fire Higher dispersion — stronger rainbow brilliance
Origin Lab-grown — low impact and ethical
Price Accessible, even at the same visible size
About the GRA Report
A unique number, for every single stone
Every SMUK moissanite comes with a GRA report (GRA Moissanite Report). GRA is a third-party body that grades moissanite, issuing a report of the cut, colour and clarity grades along with a unique warranty number. The number can be registered and verified online — proof that your stone is genuine.
※ The GRA report and warranty ID shown are sample images. Each stone is issued its own unique number, which will differ from the one pictured.
A report is included with stones of 1 carat and above. Both SMUK moissanite necklaces are around 1.0ct, so each ships with its GRA report — a reassuring choice, including as a gift for someone special.
The SMUK Moissanite Collection
A necklace set with a single moissanite of around 1.0ct, on a base of sterling silver 925 with rhodium plating. Both come with a GRA report. Choose from two cuts, each with its own character of light.
Necklace ｜ Two cuts to choose from
Round
Moissanite Necklace
approx. 6.5mm / 1.0ct (Round · Colour D / Cut Excellent) — SN260905
The classic round cut that gathers the light
Octagon Emerald Cut
Moissanite Necklace
approx. 5×7mm / 1.0ct (Octagon Emerald · Colour D / Cut Excellent) — SN260904
A clean, refined step cut
An honest, dazzling brilliance, born in the lab.
The SMUK moissanite collection — for the special days, and the everyday.
