igneous
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
Hardness: 6-7 Mohs; Color: Pink, red, white, and grey; Luster: Vitreous to dull; Structure: Granular (phaneritic); Cleavage: Perfect in feldspar grains; Specific gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, red, white, and grey
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, red, white, and grey; Luster: Vitreous to dull; Structure: Granular (phaneritic); Cleavage: Perfect in feldspar grains; Specific gravity: 2.63-2.75
Formation & geological history
Formed through the slow crystallization of magma below the Earth's surface (plutonic). This specimen appears to be a water-worn river stone or cobble, likely of Precambrian or Paleozoic age.
Uses & applications
Used extensively in construction for countertops, floor tiles, paving stones, and monuments. Also popular as decorative gravel and for shoreline armoring (riprap).
Geological facts
Granite makes up a large portion of the continental crust. The pink color is specifically due to an abundance of potassium feldspar (orthoclase). It is one of the hardest natural stones used in architecture.
Field identification & locations
Identify by its interlocking crystalline texture and lack of layering. Found globally in mountainous regions and riverbeds. Look for the 'salt and pepper' look where pink/white grains are mixed with dark minerals like biotite or hornblende.
