mineral

Diamond (in jewelry setting)

Cubic Carbon (C)

Hardness: 10 (Mohs scale), Color: Colorless/White, Luster: Adamantine, Crystal Structure: Isometric-hexoctahedral (cubic), Specific Gravity: 3.52

Identified March 10, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale), Color: Colorless/White, Luster: Adamantine, Crystal Structure: Isometric-hexoctahedral (cubic), Specific Gravity: 3.52

Formation & geological history

Formed under extreme pressure and temperature in Earth's mantle, approximately 100 miles deep. They are brought to the surface by kimberlite and lamproite volcanic eruptions. Geological age ranges from 1 billion to 3.5 billion years.

Uses & applications

Dominantly used in jewelry settings (like the bracelet shown) and industrial applications for cutting, grinding, and drilling due to extreme hardness.

Geological facts

Diamonds are the hardest known natural material. They are composed of a single element: Carbon. The name comes from the Greek word 'adamas', meaning unbreakable.

Field identification & locations

In the field, identified by hardness (can scratch corundum), high refractive index, and thermal conductivity. Commonly found in kimberlite pipes or alluvial deposits in Russia, Botswana, Canada, and Australia.