mineral

Diamond (Cullinan Heritage)

Carbon (C)

Hardness: 10 (Mohs scale), Color: Colorless to white, Luster: Adamantine, Crystal Structure: Isometric-Hexoctahedral, Cleavage: Perfect in four directions (octahedral), Specific Gravity: 3.51

Identified July 18, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale), Color: Colorless to white, Luster: Adamantine, Crystal Structure: Isometric-Hexoctahedral, Cleavage: Perfect in four directions (octahedral), Specific Gravity: 3.51

Formation & geological history

Formed under intense heat and pressure deep within Earth's mantle approximately 1 to 3 billion years ago. Brought to the surface via volcanic eruptions through kimberlite and lamproite pipes.

Uses & applications

Used in high-end jewelry, industrial abrasives, cutting tools, and as a store of extreme financial value.

Geological facts

This specific image depicts the 'Cullinan Heritage', a 507-carat rough diamond found in South Africa. The original Cullinan diamond was the largest gem-quality rough diamond ever found, weighing 3,106.75 carats.

Field identification & locations

Identify in the field by extreme hardness (scratches all other materials), high thermal conductivity, and adamantine luster. Found in kimberlite pipes or alluvial deposits in regions like South Africa, Botswana, Russia, and Canada.