igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
Hardness: 6-7 on Mohs scale; Color: Pink, reddish-pink, with black and white mottling; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Distinct in feldspar grains; Specific gravity: 2.63 to 2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, reddish-pink, with black and white mottling
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, reddish-pink, with black and white mottling; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Distinct in feldspar grains; Specific gravity: 2.63 to 2.75
Formation & geological history
Formed by the slow crystallization of magma below the Earth's surface (intrusive). Composed mainly of potassium feldspar (which gives the pink color), quartz, and mica or amphibole. Often dates back to the Precambrian or Paleozoic eras.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, monuments, and as crushed stone for road base.
Geological facts
The pink color is due to a high concentration of orthoclase feldspar. Granite makes up a large portion of the Earth's continental crust and is one of the hardest natural stones commonly used by humans.
Field identification & locations
Identify by its interlocking 'salt and pepper' crystalline texture and the presence of visible pink feldspar crystals. Found globally in mountainous regions and areas where ancient continental crust is exposed, such as the Canadian Shield or the Scottish Highlands.
