igneous
Granite
Phaneritic Felsic Intrusive Igneous Rock
Hardness: 6-7 on Mohs scale; Color: Salt-and-pepper (white, pink, gray, and black); Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained, visible crystals); Specific gravity: 2.63 to 2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Salt-and-pepper (white, pink, gray, and black)
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Salt-and-pepper (white, pink, gray, and black); Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained, visible crystals); Specific gravity: 2.63 to 2.75.
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. It is the primary component of continental crust, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, monuments, and as crushed stone for road base and concrete aggregate.
Geological facts
Granite is one of the hardest substances in the world, second only to diamonds. Famous landmarks like Mount Rushmore and the base of the Statue of Liberty are made of granite.
Field identification & locations
Identify in the field by its grainy, speckled texture and visible interlocking crystals of quartz, feldspar, and mica. It is found globally in mountainous regions and continental shields.
