What Is Moissanite?

The Stone Henri Moissan Found in a Meteorite

 

In 1893, Nobel Prize-winning chemist Henri Moissan was examining rock samples from a meteorite crater in Canyon Diablo, Arizona, when he found something that didn't belong. The crystals were harder than almost anything on earth. They threw light differently. They were, as he would later establish, silicon carbide — a mineral that had no business existing in nature, and yet there it was, inside a rock that had fallen from space.

Moissan initially thought he had found diamonds. He hadn't. What he had found was something rarer.

Natural moissanite occurs in quantities so small that a gem-quality stone cannot be sourced from the earth. It exists in meteorites, in trace amounts in certain rock formations, and almost nowhere else. Which is why every moissanite stone you will ever hold was grown in a laboratory — not as a substitute for something else, but because there is no other way to obtain it in any meaningful quantity.

 

What laboratory-grown actually means

There is a persistent confusion in the jewelry market between laboratory-grown stones and synthetic ones. They are not the same thing.

A laboratory-grown moissanite has the same molecular structure as a naturally occurring moissanite crystal. Silicon carbide, arranged in exactly the same way. The laboratory does not create a copy of the stone — it creates the stone, under controlled conditions, with greater consistency than anything formed by geological accident over millions of years.

The process produces a stone with a refractive index of 2.65. To understand what that number means: a diamond's refractive index is 2.42. Refractive index measures how much a material bends light. A higher number means more light is returned to the eye, with more dispersion — more of what jewelers call fire, the flashes of colour that appear when a stone moves. Moissanite throws more light than diamond. Not because it is trying to imitate one, but because of what it chemically is.

 

Hardness

On the Mohs scale, moissanite registers 9.25. Diamond is 10 — the hardest naturally occurring material on earth. Everything else is softer. Moissanite sits just below diamond and above every other gemstone. It does not scratch under normal wear. It does not cloud. It does not dull. A moissanite set in 925 sterling silver with rhodium plate, worn daily, will look identical in twenty years.

 

Why it matters that it came from a meteorite

It does not matter in a practical sense. The stone you wear was grown in a laboratory, not extracted from a crater in Arizona. But origin matters in the way that all origin stories matter — it tells you what something is made of, at a molecular level, and where in the cosmos those materials were first assembled.

Silicon carbide forms under conditions that don't exist on earth. The first crystals Moissan found had been inside a meteorite for longer than the planet has had oceans. When a laboratory grows moissanite today, it is replicating a structure that formed in space. That is not a marketing claim. That is chemistry.

 

The stone at Luhusati

Every Luhusati piece is set with laboratory-grown moissanite — refractive index 2.65, Mohs 9.25, colourless, in 925 sterling silver with rhodium plate or gold vermeil. Each piece leaves with a Certificate of Authenticity and a Lifetime Warranty on the stone's optical properties.