igneous
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-feldspar, Quartz, and Biotite)
Hardness: 6-7 (Mohs scale); Color: Mottled pink, white, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
- Hardness
- 6-7 (Mohs scale)
- Color
- Mottled pink, white, and black
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 (Mohs scale); Color: Mottled pink, white, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
Formation & geological history
Formed through the slow cooling and solidification of magma deep within the Earth's crust (plutonic). Most granites date from the Precambrian to Cenozoic eras.
Uses & applications
Used extensively in construction for countertops, floor tiles, and monuments. Also used as crushed stone for road base and railroad ballast.
Geological facts
Granite is the most common rock found in the Earth's continental crust. The pink color specifically comes from an abundance of potassium feldspar (orthoclase).
Field identification & locations
Identify by its 'salt and pepper' appearance with pinkish hues and visible mineral grains. Commonly found in mountainous regions or glacial till. It is extremely durable and resistant to weathering.
