igneous
Pink granite
Granite, commonly quartz–alkali feldspar–biotite granite
AI-generated identification · may be incorrectCoarse-grained, pink to reddish rock with black biotite or hornblende and gray quartz; hardness about 6–7 Mohs, vitreous quartz luster, interlocking crystalline texture, and no prominent cleavage as a whole. The dark minerals and pink feldspar are diagnostic.
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Physical properties
Coarse-grained, pink to reddish rock with black biotite or hornblende and gray quartz; hardness about 6–7 Mohs, vitreous quartz luster, interlocking crystalline texture, and no prominent cleavage as a whole. The dark minerals and pink feldspar are diagnostic.
Formation & geological history
An intrusive igneous rock crystallized slowly from silica-rich magma deep in the continental crust, typically during Precambrian to Phanerozoic plutonic events. Uplift and erosion later exposed the granite at the surface.
Uses & applications
Used extensively as dimension stone, countertops, monuments, paving, crushed aggregate, and decorative landscaping rock; attractive polished pieces have modest lapidary and collecting value.
Geological facts
Pink coloration mainly comes from potassium feldspar, while black specks are usually biotite or hornblende. Granite commonly forms large batholiths and resistant tors.
Field identification & locations
Identify it by visible interlocking crystals of pink feldspar, gray translucent quartz, and black mica/amphibole; it is commonly found in continental mountain belts and exposed shields. A hand lens and streak test help distinguish it from pink gneiss, which shows foliation.
