mineral
Graphite
Graphite (C)
AI-generated identification · may be incorrectHardness 1-2 on Mohs scale, steel-gray to black color, metallic to earthy luster, hexagonal crystal system, perfect basal cleavage, specific gravity 2.1-2.3.
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Physical properties
Hardness 1-2 on Mohs scale, steel-gray to black color, metallic to earthy luster, hexagonal crystal system, perfect basal cleavage, specific gravity 2.1-2.3.
Formation & geological history
Forms through the metamorphism of carbon-rich organic material in sedimentary rocks or via igneous and hydrothermal processes.
Uses & applications
Used in refractories, batteries, steelmaking, brake linings, lubricants, and pencil leads.
Geological facts
Graphite is a polymorph of diamond, meaning both are made entirely of carbon but have drastically different crystal structures.
Field identification & locations
Identified by its extremely low hardness, greasy feel, dark gray streak, and electrical conductivity; found worldwide in metamorphic terranes.
