igneous
Pink granite
Granite, typically quartz–alkali feldspar–plagioclase–biotite aggregate
AI-generated identification · may be incorrectCoarse-grained, interlocking crystals with pink/tan feldspar, gray translucent quartz, and black biotite or hornblende; vitreous quartz and feldspar luster, no consistent cleavage as a whole, hardness about 6–7, specific gravity roughly 2.6–2.7.
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Physical properties
Coarse-grained, interlocking crystals with pink/tan feldspar, gray translucent quartz, and black biotite or hornblende; vitreous quartz and feldspar luster, no consistent cleavage as a whole, hardness about 6–7, specific gravity roughly 2.6–2.7.
Formation & geological history
An intrusive felsic igneous rock formed when silica-rich magma cooled slowly deep within continental crust, allowing large crystals to grow; commonly Precambrian to Phanerozoic in age.
Uses & applications
Widely used for dimension stone, countertops, monuments, curbing, flooring, aggregate, and decorative polished slabs; ordinary hand specimens have little monetary value.
Geological facts
Its speckled texture records slow underground cooling, while pink coloration usually comes from potassium feldspar. Dark minerals may weather out, leaving a rough granular surface.
Field identification & locations
Common in continental mountain belts and exposed batholiths worldwide, including India, Brazil, Scandinavia, and the United States. Identify it by visible interlocking quartz, feldspar, and dark mica; unlike rhyolite, it is coarse-grained.
