mineral

Diamond (Uncut/Rough)

Carbon (C)

Hardness: 10 (Mohs scale), Color: Colorless to pale yellow/gray, Luster: Adamantine to greasy (when rough), Crystal Structure: Isometric-hexoctahedral, Cleavage: Octahedral, Specific Gravity: 3.51

Identified May 29, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale), Color: Colorless to pale yellow/gray, Luster: Adamantine to greasy (when rough), Crystal Structure: Isometric-hexoctahedral, Cleavage: Octahedral, Specific Gravity: 3.51

Formation & geological history

Formed deep in the Earth's mantle under extreme pressure and high temperatures, then brought to the surface via volcanic eruptions through kimberlite and lamproite pipes.

Uses & applications

Used in high-end jewelry (when cut), industrial abrasives, cutting tools, precision drilling, and high-performance electronics.

Geological facts

Diamond is the hardest naturally occurring substance on Earth. Most natural diamonds are between 1 billion and 3.5 billion years old.

Field identification & locations

Identify by its extreme hardness (cannot be scratched by any other mineral) and its isometric crystal shape (often octahedral). Found in river beds (alluvial deposits) or kimberlite pipes.