igneous
Pink granite (weathered granitic rock)
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, pink to salmon matrix with dark mafic flecks and gray translucent quartz; crystals show interlocking texture and generally no cleavage as a whole. Mineral hardness is approximately 6–7 Mohs; luster ranges from vitreous (quartz) to pearly or dull on weathered surfaces; specific gravity about 2.6–2.7.
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Physical properties
Coarse-grained, pink to salmon matrix with dark mafic flecks and gray translucent quartz; crystals show interlocking texture and generally no cleavage as a whole. Mineral hardness is approximately 6–7 Mohs; luster ranges from vitreous (quartz) to pearly or dull on weathered surfaces; specific gravity about 2.6–2.7.
Formation & geological history
An intrusive igneous rock that crystallized slowly from silica-rich magma deep in continental crust, commonly during Precambrian to younger continental pluton formation. The rough, softened surface reflects weathering and erosion.
Uses & applications
Widely used as dimension stone, countertops, monuments, building stone, aggregate, and decorative landscaping material; attractive specimens have modest collector interest.
Geological facts
Pink coloration typically comes from potassium feldspar, while dark grains are biotite or amphibole. Granite commonly develops rounded boulders through spheroidal weathering.
Field identification & locations
Identify it by visible interlocking crystals, abundant pink feldspar, gray quartz, and scattered black minerals; a glassy streak or acid reaction would suggest alternatives. Common worldwide in exposed batholiths and granitic terrains.
