igneous
Pink Granite
Phaneritic intrusive igneous rock (high Orthoclase Feldspar content)
Hardness: 6-7 Mohs; Color: Pink, salmon, or reddish with black and gray speckles; Luster: Vitreous to dull; Structure: Phaneritic (coarse-grained crystals); Cleavage: Perfect in two directions for feldspar components.
- Hardness
- 6-7 Mohs
- Color
- Pink, salmon, or reddish with black and gray speckles
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, salmon, or reddish with black and gray speckles; Luster: Vitreous to dull; Structure: Phaneritic (coarse-grained crystals); Cleavage: Perfect in two directions for feldspar components.
Formation & geological history
Formed from the slow cooling of silica-rich magma deep beneath the Earth's surface (plutonic). Found in continental crust; often associated with Precambrian shields or orogenic belts.
Uses & applications
Widely used as dimension stone in construction, countertops, monuments, floor tiles, and as crushed stone for road base.
Geological facts
The pink color comes specifically from Potassium Feldspar (Orthoclase). Granite is the most common igneous rock found on Earth's continents. The 'Pikes Peak Granite' in Colorado is a famous example of this pink variety.
Field identification & locations
Identify by the visible interlocking crystals of pink feldspar, translucent quartz, and dark minerals like biotite or hornblende. It will not react with acid and is very difficult to scratch with a steel knife.
