mineral

Diamond (Faceted)

Carbon (C) - Diamond

Hardness: 10 (Mohs scale); Color: Colorless (as shown); Luster: Adamantine; Crystal structure: Cubic (Isometric); Cleavage: Perfect octahedral (4 directions); Specific gravity: 3.52.

Hardness: 10 (Mohs scale)
Color: Colorless (as shown)
Luster: Adamantine

Identified March 11, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale); Color: Colorless (as shown); Luster: Adamantine; Crystal structure: Cubic (Isometric); Cleavage: Perfect octahedral (4 directions); Specific gravity: 3.52.

Formation & geological history

Formed at depths of 150-200km in the mantle under extreme pressure and high temperatures. Transported to the surface via kimberlite or lamproite volcanic eruptions. Formations date from 1 billion to 3.5 billion years old.

Uses & applications

Primary use in fine jewelry as a gemstone. Industrial applications include cutting, drilling, and grinding tools due to its unparalleled hardness. Also used in high-end electronics and optics.

Geological facts

Diamond is the hardest natural substance on Earth. It is the only gemstone composed of a single element (Carbon). The 'Hope Diamond' is one of the most famous specimens, known for its deep blue color and historical curse.

Field identification & locations

Field identification is difficult for faceted stones without specialized equipment (refractometers, loupes). In rough form, look for greasy luster and octahedral shapes. Commonly found in South Africa, Russia, Canada, and Australia.