mineral

Diamond (Cluster Ring)

Carbon (C)

Hardness: 10 (Mohs scale), Color: Colorless to white (in this specimen), Luster: Adamantine, Crystal Structure: Isometric-Hexoctahedral, Cleavage: Octahedral, Specific Gravity: 3.51

Identified April 1, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale), Color: Colorless to white (in this specimen), Luster: Adamantine, Crystal Structure: Isometric-Hexoctahedral, Cleavage: Octahedral, Specific Gravity: 3.51

Formation & geological history

Formed at extremely high temperatures and pressures deep within the Earth's mantle, approximately 90-120 miles down. Most were transported to the surface by kimberlite and lamproite volcanic eruptions occurring billions of years ago.

Uses & applications

Primary use in jewelry and as symbols of status. Industrially used for cutting, grinding, and drilling tools due to unparalleled hardness.

Geological facts

Diamonds are the hardest known natural substance. The word comes from the Greek 'adamas', meaning unbreakable. They are the only gemstone made of a single element: Carbon.

Field identification & locations

Identify by extreme hardness (scratches all other minerals) and high refractive index. Look for hallmarks on the metal band (e.g., 10K, 14K) which often indicate the value of the stones set within.