mineral

Diamond

Carbon (C)

Hardness: 10 (Mohs scale); Color: Colorless/White (in this specimen); Luster: Adamantine; Crystal Structure: Isometric (cubic); Cleavage: Perfect in four directions; Specific Gravity: 3.52

Hardness: 10 (Mohs scale)
Color: Colorless/White (in this specimen)
Luster: Adamantine

Identified June 28, 2026More mineral →

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Physical properties

Hardness: 10 (Mohs scale); Color: Colorless/White (in this specimen); Luster: Adamantine; Crystal Structure: Isometric (cubic); Cleavage: Perfect in four directions; Specific Gravity: 3.52

Formation & geological history

Formed deep within the Earth's mantle (150-200km) under extreme pressure and heat, then transported to the surface by kimberlite or lamproite volcanic eruptions. Most are 1 to 3.5 billion years old.

Uses & applications

Primary use in jewelry as gemstones; industrial uses include cutting, drilling, and grinding tools due to extreme hardness.

Geological facts

Diamonds are the hardest natural substance known on Earth. South Kalimantan, Indonesia (near the coordinates provided), is famous for the Cempaka diamond fields which have produced gems for centuries.

Field identification & locations

Identify by extreme hardness, high refractive index (brilliance), and thermal conductivity. Found in alluvial deposits in South Kalimantan. Collectors look for clarity, color, and carat weight.