mineral

Diamond

C (Native Carbon)

Hardness: 10 (Mohs scale), Color: Colorless (in this specimen), Luster: Adamantine, Crystal Structure: Isometric (Cubic), Cleavage: Octahedral, Specific Gravity: 3.52

Identified May 30, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale), Color: Colorless (in this specimen), Luster: Adamantine, Crystal Structure: Isometric (Cubic), Cleavage: Octahedral, Specific Gravity: 3.52

Formation & geological history

Formed at extremely high pressures and temperatures deep within the Earth's mantle, approximately 150 to 200 kilometers below the surface. They are brought to the surface through deep-origin volcanic eruptions called kimberlite or lamproite pipes.

Uses & applications

Primarily used in jewelry for its brilliance and hardness; also used extensively in industrial applications such as cutting, grinding, and drilling tools due to being the hardest natural substance.

Geological facts

Diamonds are billions of years old, often ranging from 1 to 3.5 billion years in age. Only about 20% of diamonds mined are gem-quality, with the rest used for industrial purposes.

Field identification & locations

Identification includes testing for high thermal conductivity and extreme hardness. In the field, it is often sought in kimberlite pipes or alluvial deposits (stream beds) near these pipes.