mineral

Rough Diamond

Diamond (Native Carbon, C)

Hardness: 10 (Mohs scale); Color: Clear, yellow, or brown; Luster: Adamantine (to greasy in rough state); Crystal structure: Isometric-hexoctahedral; Specific Gravity: 3.52.

Hardness: 10 (Mohs scale)
Color: Clear, yellow, or brown
Luster: Adamantine (to greasy in rough state)

Identified July 7, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale); Color: Clear, yellow, or brown; Luster: Adamantine (to greasy in rough state); Crystal structure: Isometric-hexoctahedral; Specific Gravity: 3.52.

Formation & geological history

Formed under extreme pressure and temperature in the Earth's mantle, approximately 150-200 kilometers deep. Transported to the surface by deep-origin volcanic eruptions known as kimberlite or lamproite pipes.

Uses & applications

Used primarily in high-end jewelry (when cut/polished), and in industrial applications for cutting, grinding, and drilling due to its extreme hardness.

Geological facts

Diamonds are the hardest known natural material. They are essentially pure carbon arranged in a crystal structure that makes them incredibly strong. Most natural diamonds are between 1 billion and 3.5 billion years old.

Field identification & locations

Identify in the field by checking for an adamantine luster and the ability to scratch any other mineral. Commonly found in alluvial deposits or within kimberlite pipes in regions like South Africa, Russia, Canada, and Australia.