gemstone
Black Diamond
Carbon (C), variety Carbonado
AI-generated identification · may be incorrectHardness of 10 on the Mohs scale, black or dark gray color, adamantine to submetallic luster, and cryptocrystalline structure with no cleavage.
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Physical properties
Hardness of 10 on the Mohs scale, black or dark gray color, adamantine to submetallic luster, and cryptocrystalline structure with no cleavage.
Formation & geological history
Formed in ancient metamorphic environments under extreme pressure, often theorized to have extraterrestrial origins via asteroid impacts.
Uses & applications
Used primarily in high-end jewelry and industrial cutting tools due to extreme toughness.
Geological facts
Unlike typical diamonds, black diamonds are porous and contain abundant graphite inclusions that give them their dark color.
Field identification & locations
Identified by extreme hardness, opaque dark appearance, and irregular aggregate form; found mainly in Brazil and the Central African Republic.
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