gemstone

Diamond (Cut Gemstones in Jewelry)

Carbon (C)

AI-generated identification · may be incorrect

Hardness: 10 (Mohs scale); Color: Colorless to brownish-yellow; Luster: Adamantine; Crystal structure: Cubic; Specific gravity: 3.52

Hardness: 10 (Mohs scale)
Color: Colorless to brownish-yellow
Luster: Adamantine

Identified July 6, 2026More gemstone →

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Physical properties

Hardness: 10 (Mohs scale); Color: Colorless to brownish-yellow; Luster: Adamantine; Crystal structure: Cubic; Specific gravity: 3.52

Formation & geological history

Formed under high temperature and high pressure conditions deep in the Earth's mantle, typically at depths of 150-200 kilometers, and brought to the surface by kimberlite eruptions.

Uses & applications

Primarily used in fine jewelry (rings, bracelets, necklaces) and industrial applications for cutting, grinding, and drilling due to its extreme hardness.

Geological facts

Diamonds are the hardest natural substance on Earth. The gemstone in the image appears to be set in a tennis-style bracelet, which gained fame after Chris Evert's match in 1987.

Field identification & locations

Identify by high refractive index, extreme hardness (scratches all other minerals), and thermal conductivity. Often found in primary kimberlite pipes or secondary alluvial deposits.