igneous
Granite
Felsic intrusive igneous rock
Hardness: 6 on the Mohs scale. Color: Varies widely (gray, pink, white) depending on mineral content. Luster: Dull to glassy. Crystal structure: Phaneritic (coarse-grained, visible crystals). Specific gravity: 2.65 to 2.75.
- Hardness
- 6 on the Mohs scale
- Luster
- Dull to glassy
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Physical properties
Hardness: 6 on the Mohs scale. Color: Varies widely (gray, pink, white) depending on mineral content. Luster: Dull to glassy. Crystal structure: Phaneritic (coarse-grained, visible crystals). Specific gravity: 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali metal oxides that is trapped beneath the Earth's surface over millions of years.
Uses & applications
Used extensively in construction, countertops, monuments, flooring, and decorative aggregate.
Geological facts
Granite is the most common igneous rock in the Earth's continental crust and is exceptionally durable against weathering.
Field identification & locations
Identified by its interlocking, visible grains of quartz, feldspar, and mica. Found globally in mountain ranges and continental shields.
