What is a Moissanite?

Moissanite is a mineral known as silicon carbide, often called the "gemstone from the stars." It was first discovered in 1893 by Nobel Prize-winning chemist Henri Moissan within a meteorite found in Canyon Diablo, Arizona. Initially mistaken for diamonds, Moissan later identified the crystals as silicon carbide in 1904. The mineral was subsequently named moissanite in his honour.

In nature, moissanite is extremely rare. It wasn’t until 1958 that geologists found it outside meteorites—first in Wyoming’s upper mantle and then as inclusions in Russian rock the following year.

Today, moissanite is primarily produced in laboratories. This controlled production process ensures traceability and eliminates the need for mining, making moissanite a more environmentally friendly option with a reduced carbon footprint compared to mined gems.

Moissanite is increasingly chosen as an alternative to diamonds, particularly for engagement rings and other jewellery pieces.

Is Moissanite a Diamond?

Moissanite is not a diamond. Although they may appear similar to the untrained eye, moissanite and diamonds are fundamentally different. Diamonds are composed of carbon, while moissanites are made of silicon carbide.

Moissanite has a higher refractive index than diamonds, meaning it displays more colourful "fire" when light strikes its surface. Additionally, diamonds are harder, scoring a 10 on the Mohs scale, whereas moissanite scores 9.25.

Both gemstones exhibit dispersion and scintillation and are good thermal conductors, but their distinct compositions and properties set them apart.