igneous
Granite
Felsic intrusive igneous rock
Hardness: 6 on the Mohs scale. Color: Typically pink, white, grey, or black speckled. Luster: Dull to vitreous. Crystal structure: Phaneritic (coarse-grained, visible interlocking crystals). Cleavage: None distinct. Specific gravity: 2.65 - 2.75.
- Hardness
- 6 on the Mohs scale
- Color
- Typically pink, white, grey, or black speckled
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6 on the Mohs scale. Color: Typically pink, white, grey, or black speckled. Luster: Dull to vitreous. Crystal structure: Phaneritic (coarse-grained, visible interlocking crystals). Cleavage: None distinct. 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.
Uses & applications
Used extensively in construction, architecture, countertops, monuments, and curbing.
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 consisting of quartz, feldspar, and mica. Found globally in mountainous regions and shield areas.
