igneous
Granite
Granite (Phaneritic Quartz-Feldspar rock)
Hardness: 6-7 Mohs; Color: Grey, white, with hints of green/pink; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Grey, white, with hints of green/pink
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 Mohs; Color: Grey, white, with hints of green/pink; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
Formation & geological history
Formed by the slow crystallization of magma below Earth's surface. It is plutonic and often found in continental crust originating from various geological ages, frequently Pre-Cambrian to Cenozoic.
Uses & applications
Extensively used in construction (countertops, flooring, monuments), aggregate for roads, and as dimension stone in architecture.
Geological facts
Granite is the most common igneous rock found on Earth's continents. The green tint seen here may be due to the presence of chlorite or epidote minerals within the specimen.
Field identification & locations
Identify in the field by its coarse, interlocking crystals of quartz and feldspar. It is found in mountain ranges and batholiths worldwide.
