igneous
Pink granite
Granite; predominantly quartz, alkali feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, speckled pink-gray rock with glassy gray quartz, pink feldspar, and dark mica/amphibole; hardness about 6–7 Mohs, granular texture, and no cleavage as a whole. Typically has a vitreous quartz luster and specific gravity around 2.63–2.75.
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Physical properties
Coarse-grained, speckled pink-gray rock with glassy gray quartz, pink feldspar, and dark mica/amphibole; hardness about 6–7 Mohs, granular texture, and no cleavage as a whole. Typically has a vitreous quartz luster and specific gravity around 2.63–2.75.
Formation & geological history
An intrusive felsic igneous rock formed when silica-rich magma cooled slowly deep underground, allowing visible crystals to grow; many examples formed during Precambrian to Mesozoic continental crust development.
Uses & applications
Widely used as dimension stone, countertops, monuments, paving, aggregate, and decorative landscaping rock; small natural pieces have modest collector value.
Geological facts
The pink color generally comes from potassium feldspar, while black grains are biotite or hornblende. Granite commonly weathers into rounded boulders and sandy grus.
Field identification & locations
Identify it by its interlocking, visible crystals and pink-gray-black color pattern; unlike sandstone, it lacks cemented layers or rounded grains. Common worldwide, including India, Brazil, Scandinavia, Canada, and the United States.
