igneous
Pink Granite
Phaneritic Plutonic Felsic Rock (Granite)
Hardness: 6-7 Mohs; Color: Pink, reddish-tan, grey, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained) equigranular; Specific gravity: 2.63 to 2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, reddish-tan, grey, and black
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, reddish-tan, grey, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained) equigranular; Specific gravity: 2.63 to 2.75
Formation & geological history
Formed by the slow crystallization of silica-rich magma beneath the Earth's surface. High potassium feldspar content gives it the pink hue. Can range from Precambrian to Cenozoic geological ages.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments due to its durability and aesthetic appeal.
Geological facts
Granite makes up a large portion of the continental crust. The pink color is specifically due to the abundance of orthoclase feldspar. Famous monuments like Mt. Rushmore are carved from granitic rock.
Field identification & locations
Identify in the field by its interlocking visible crystals of pink feldspar, clear/grey quartz, and dark biotite or hornblende. It is ubiquitous in continental mountain ranges and shield areas.
