mineral

Diamond (in a jewelry setting)

Carbon (C)

Hardness: 10 (Mohs scale); Color: Typically colorless/white when cut; Luster: Adamantine; Crystal structure: Isometric-hexoctahedral; Specific gravity: 3.5–3.53.

Hardness: 10 (Mohs scale)
Color: Typically colorless/white when cut
Luster: Adamantine

Identified March 29, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale); Color: Typically colorless/white when cut; Luster: Adamantine; Crystal structure: Isometric-hexoctahedral; Specific gravity: 3.5–3.53.

Formation & geological history

Formed under extreme high-pressure, high-temperature conditions in the Earth's mantle, approximately 100 miles below the surface, and brought upward by deep-seated volcanic eruptions called kimberlites.

Uses & applications

Primary use in high-end jewelry (engagement rings, necklaces), as well as industrial applications for cutting, grinding, and drilling due to its extreme hardness.

Geological facts

Diamonds are the hardest known natural substance. The stones in this ring appear to be 'melee' diamonds (small, mass-produced cut stones used to accent jewelry).

Field identification & locations

In the field, natural diamonds are found in kimberlite pipes or alluvial deposits. Identification of faceted stones involves checking for high refractive index, heat conductivity, and the ability to scratch any other mineral.