mineral
Graphite
Carbon (C)
AI-generated identification · may be incorrectHardness of 1-2 on the Mohs scale, steel-gray to black color, metallic to earthy luster, and perfect basal cleavage with a hexagonal crystal system.
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Physical properties
Hardness of 1-2 on the Mohs scale, steel-gray to black color, metallic to earthy luster, and perfect basal cleavage with a hexagonal crystal system.
Formation & geological history
Forms through the metamorphism of organic carbon-rich sedimentary rocks or via igneous and hydrothermal processes over millions of years.
Uses & applications
Used widely in refractory materials, batteries, steelmaking, lubricants, and as the core material in pencils.
Geological facts
Graphite is a polymorph of diamond, meaning both are made entirely of carbon but possess vastly different crystal structures and physical properties.
Field identification & locations
Easily identified by its extreme softness, greasy feel, dark gray streak, and ability to leave marks on paper; found worldwide in metamorphic terranes.
