gemstone

Faceted colorless gemstone, likely diamond

Diamond, crystalline carbon (C); identity cannot be confirmed from the photo

AI-generated identification · may be incorrect

Colorless, transparent, brilliant-cut appearance with strong sparkle. Diamond has Mohs hardness 10 and a cubic crystal structure; a photo alone cannot establish its hardness, luster, or authenticity.

Identified October 11, 2026More gemstone →

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Physical properties

Colorless, transparent, brilliant-cut appearance with strong sparkle. Diamond has Mohs hardness 10 and a cubic crystal structure; a photo alone cannot establish its hardness, luster, or authenticity.

Formation & geological history

Natural diamonds crystallize deep in Earth’s mantle under extreme pressure and heat, commonly more than a billion years ago, and reach the surface in kimberlite or lamproite eruptions. The pictured stone may also be synthetic or a simulant.

Uses & applications

Used in jewelry and, because of its hardness, in cutting, grinding, and drilling tools.

Geological facts

A round brilliant cut is designed to maximize light return. Moissanite and cubic zirconia can resemble diamond but have different properties and value.

Field identification & locations

Look for a professional gemological test; visual sparkle is not enough to identify diamond or distinguish natural from lab-grown. Natural diamonds occur notably in Botswana, Russia, Canada, and South Africa.