gemstone

Diamond (Faceted)

Carbon (C)

Hardness: 10 (Mohs scale), Color: Clear/Colorless, Luster: Adamantine, Crystal Structure: Cubic/Isometric, Cleavage: Perfect octahedral, Specific Gravity: 3.52

Identified July 6, 2026More gemstone →

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Physical properties

Hardness: 10 (Mohs scale), Color: Clear/Colorless, Luster: Adamantine, Crystal Structure: Cubic/Isometric, Cleavage: Perfect octahedral, Specific Gravity: 3.52

Formation & geological history

Formed in Earth's mantle under high pressure and temperature conditions over millions to billions of years, then brought to the surface by kimberlite and lamproite volcanic eruptions.

Uses & applications

Used extensively in jewelry as a gemstone, and in industrial applications for cutting, drilling, and grinding tools due to its extreme hardness.

Geological facts

Diamonds are the hardest natural substance on Earth and consist entirely of carbon atoms arranged in a crystal lattice. Many jewelry pieces use synthetics or simulants like cubic zirconia which closely resemble this specimen.

Field identification & locations

Identified by its high refractive index (brilliance), extreme hardness (cannot be scratched by metal), and thermal conductivity. Often found in kimberlite pipes or alluvial deposits.