mineral

Moissanite

Silicon Carbide (SiC)

Hardness: 9.25 (Mohs scale); Color: Colorless, green, yellow; Luster: Adamantine to metallic; Crystal structure: Hexagonal; Specific gravity: 3.21-3.22

Hardness: 9
Color: Colorless, green, yellow
Luster: Adamantine to metallic

Identified March 10, 2026More mineral →

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Physical properties

Hardness: 9.25 (Mohs scale); Color: Colorless, green, yellow; Luster: Adamantine to metallic; Crystal structure: Hexagonal; Specific gravity: 3.21-3.22

Formation & geological history

Extreme pressure and temperature environments. Naturally occurring moissanite is primarily found in meteorites (stardust) and occasionally as inclusions in diamonds or within upper mantle rocks.

Uses & applications

Abrasives (carborundum), semiconductors, and widely used as a diamond simulant in jewelry due to its high fire and brilliance.

Geological facts

Naturally occurring moissanite is one of the rarest minerals on Earth; almost all moissanite used in jewelry today is lab-grown. It has a higher refractive index and more 'fire' than a diamond.

Field identification & locations

Extremely difficult to find in the field due to rarity. In jewelry, it is identified by its double refraction (unlike diamond) and its ability to conduct heat, though it can fool older diamond testers.