gemstone
Diamond (or Clear Zircon/Sapphire)
Carbon (C)
AI-generated identification · may be incorrectHardness: 10 Mohs. Color: Colorless to faint yellow/brown. Luster: Adamantine. Crystal Structure: Isometric-hexoctahedral. Specific Gravity: 3.51.
- Hardness
- 10 Mohs
- Color
- Colorless to faint yellow/brown
- Luster
- Adamantine
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Physical properties
Hardness: 10 Mohs. Color: Colorless to faint yellow/brown. Luster: Adamantine. Crystal Structure: Isometric-hexoctahedral. Specific Gravity: 3.51.
Formation & geological history
Formed under extreme pressure and temperature in the Earth's mantle, approximately 90 to 120 miles deep, and brought to the surface by kimberlite volcanic eruptions.
Uses & applications
Primary use in high-end jewelry (engagement rings, necklaces), industrial abrasives, cutting tools, and thermal insulators for electronics.
Geological facts
Diamonds are the hardest known natural substance. The majority of natural diamonds are between 1 billion and 3.5 billion years old.
Field identification & locations
Field identification of a loose cut stone involves checking for high refractive index (brilliance) and testing for thermal conductivity. It is frequently found in kimberlite pipes or alluvial deposits.
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