igneous
Granite fragment
Granite (Felsic Plutonic Rock)
Hardness: 6-7 on Mohs scale; Color: Pinkish-red, white, and grey; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Pinkish-red, white, and grey
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pinkish-red, white, and grey; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. This intrusive process allows for the development of visible mineral crystals of quartz, feldspar, and mica.
Uses & applications
Used extensively in construction for countertops, floor tiles, paving stones, and monuments due to its durability and aesthetic appeal.
Geological facts
Granite is the most common igneous rock found on Earth's continents and makes up much of the continental crust. It is highly resistant to weathering.
Field identification & locations
Identify in the field by its speckled appearance and visible interlocking crystals of different colors. It is found in mountain ranges and continental shield areas.
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