igneous
Granite
Felsic intrusive igneous rock
Hardness: 6 on the Mohs scale. Color: Generally pink, white, gray, or black with speckled appearance. Luster: Dull to vitreous. Crystal structure: Phaneritic (coarse-grained, visible crystals). Cleavage: None distinct. Specific Gravity: 2.65 - 2.75.
- Hardness
- 6 on the Mohs scale
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6 on the Mohs scale. Color: Generally pink, white, gray, or black with speckled appearance. 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 cooling of silica-rich magma beneath the Earth's surface over millions of years. Common in continental crust.
Uses & applications
Widely used in construction, architectural building facades, monuments, floor tiles, and countertops.
Geological facts
Granite is the primary component of the continental crust of the Earth. It is exceptionally durable, which is why it has been used for ancient monuments and modern kitchen counters alike.
Field identification & locations
Easily identified in the field by its interlocking, visible crystals of quartz, feldspar, and biotite mica. Found globally in major mountain ranges and continental shields.
