igneous
Pink granite
Granitic rock, chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, pink-and-gray, granular texture with glassy quartz, pink feldspar, and dark mica/amphibole; hardness about 6–7 Mohs, nonfoliated, massive, and typically with poor or no cleavage at the rock scale.
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Physical properties
Coarse-grained, pink-and-gray, granular texture with glassy quartz, pink feldspar, and dark mica/amphibole; hardness about 6–7 Mohs, nonfoliated, massive, and typically with poor or no cleavage at the rock scale.
Formation & geological history
An intrusive felsic igneous rock formed when silica-rich magma cooled slowly deep underground, allowing large crystals to grow. Its exact geological age cannot be determined from the photograph; granite ranges from Precambrian to recent geological ages.
Uses & applications
Widely used as dimension stone, countertops, monuments, paving, aggregate, and landscaping material; attractive hand specimens are collected but usually have modest value.
Geological facts
The pink color commonly comes from potassium feldspar, while black flakes or crystals are biotite or hornblende. Weathering may release individual feldspar and quartz grains.
Field identification & locations
Identify it by visible interlocking crystals, pink feldspar, translucent gray quartz, and dark mica/amphibole, with no layering or foliation. Common worldwide in continental crust, including batholiths and mountain belts.
