igneous
Granite
Felsic intrusive igneous rock
Hardness: 6-7 on the Mohs scale. Color: Varies widely including pink, white, grey, and black depending on mineral content. Luster: Dull to glassy. Crystal structure: Phaneritic (coarse-grained) with visible interlocking crystals of quartz, feldspar, and mica. Specific gravity: 2.65-2.75.
- Hardness
- 6-7 on the Mohs scale
- Luster
- Dull to glassy
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Physical properties
Hardness: 6-7 on the Mohs scale. Color: Varies widely including pink, white, grey, and black depending on mineral content. Luster: Dull to glassy. Crystal structure: Phaneritic (coarse-grained) with visible interlocking crystals of quartz, feldspar, and mica. Specific gravity: 2.65-2.75.
Formation & geological history
Formed from the slow crystallization of magma below the Earth's surface over millions of years, typically found in continental crust.
Uses & applications
Widely used in construction, monument building, countertops, tiles, and as a crushed aggregate for roadways.
Geological facts
Granite is the most common rock of the Earth's continental crust and is exceptionally durable against weathering.
Field identification & locations
Easily identified by its distinctive speckled appearance with prominent interlocking mineral grains (quartz, feldspar, and biotite). Found globally in major mountain ranges and shield areas.
