mineral

Diamond (in jewelry)

Cubic Carbon (C)

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

Identified May 29, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed under extreme high pressure and temperature deep within the Earth's mantle (over 150 km deep), then transported to the surface by kimberlite eruptions.

Uses & applications

Primarily used in high-end jewelry (engagement rings, necklaces) and for industrial cutting, grinding, and drilling tools due to extreme hardness.

Geological facts

Diamonds are the hardest known natural substance. The stones in the image appear to be small round brilliant cuts set in a crown-style ring, which could be natural diamonds or synthetic alternatives like Cubic Zirconia.

Field identification & locations

Identify by extreme hardness and high refractive index. Natural sources include Russia, Botswana, Canada, and South Africa. Collectors look for the 'Four Cs': Cut, Color, Clarity, and Carat weight.