igneous
Granite
Felsic intrusive igneous rock
Hardness: 6 on Mohs scale; Color: Pink, white, gray, or black speckled; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained, visible crystals); Cleavage: None distinct; Specific Gravity: 2.65 - 2.75
- Hardness
- 6 on Mohs scale
- Color
- Pink, white, gray, or black speckled
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6 on Mohs scale; Color: Pink, white, gray, or black speckled; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained, visible crystals); Cleavage: None distinct; Specific Gravity: 2.65 - 2.75
Formation & geological history
Formed from the slow crystallization of magma deep beneath the Earth's surface over millions of years, typically during mountain-building events or continental crust formation.
Uses & applications
Widely used in construction, architecture, countertops, monuments, and curbing due to its high durability and resistance to weathering.
Geological facts
Granite is the most common rock of the Earth's continental crust and is frequently used as a building material because it can bear immense weight and takes a brilliant polish.
Field identification & locations
Easily identified by its visibly speckled, interlocking mineral crystals of quartz, feldspar, and mica. Found globally in major mountain ranges and shield areas.
