The Guide to Moissanite

What is moissanite?

Moissanite is silicon carbide, a gemstone distinct from diamond. Jewellery-grade moissanite is generally laboratory-created; natural moissanite is exceptionally rare.

Moissanite vs diamond

Diamond is carbon; moissanite is silicon carbide. They differ in optical properties, density and hardness. Moissanite is not a natural or laboratory-grown diamond.

Brilliance and fire

Brilliance is the return of white light; fire is the separation of light into spectral colours. Moissanite is known for strong fire, though cut, lighting and cleanliness influence appearance.

Durability and hardness

Moissanite is commonly rated around 9.25 on the Mohs hardness scale, compared with diamond at 10. Hardness describes resistance to scratching, not immunity to chips, breaks or setting damage.

Clarity and colour

Check the individual product’s grading description and issuer. D–F and VVS terminology is sometimes used for moissanite, but it should not be assumed to represent a diamond grading report.

Stone shapes

Explore round, oval, emerald, pear, cushion, princess, marquise, radiant, Asscher and heart shapes. Shape is the outline; cut quality describes how the facets are proportioned and finished.

Carat equivalent

Moissanite and diamond have different densities. Diamond equivalent weight compares apparent size, rather than stating a moissanite stone’s actual weight. Always check dimensions in millimetres.

Jewellery care

Use mild soap, lukewarm water and a soft brush. Rinse and dry carefully. Avoid harsh chemicals and impacts; care requirements also depend on the setting and metal.

Frequently asked questions

Is moissanite a diamond?

No. It is a different gemstone with its own composition and optical properties.

Can I wear it every day?

Its scratch resistance makes it suitable for many everyday jewellery styles. Remove jewellery before heavy work, sport or exposure to harsh chemicals.

Does every piece come with a report?

Check the product listing for the exact documentation supplied. Do not assume certification unless explicitly stated.