igneous
Granite
Felsic Plutonic Rock
Hardness: 6-7 Mohs; Color: Salt and pepper/grey-white; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained); Specific Gravity: 2.63 to 2.75
- Hardness
- 6-7 Mohs
- Color
- Salt and pepper/grey-white
- Luster
- Dull to vitreous
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Salt and pepper/grey-white; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained); Specific Gravity: 2.63 to 2.75
Formation & geological history
Formed through the slow crystallization of magma below Earth's surface in the subterranean crust. It is a major component of the continental crust and can date back millions to billions of years.
Uses & applications
Widely used in construction, countertops, monuments, floor tiles, and as crushed stone for road base.
Geological facts
Granite is one of the hardest substances in the world, second only to diamonds. The El Capitan in Yosemite National Park is one of the world's most famous granite monoliths.
Field identification & locations
Identify by its interlocking mineral crystals (quartz, feldspar, and mica) and its hardness (it will not be scratched by a steel blade). Very common in mountain ranges and continental shields.
