igneous
Weathered granite, possibly pink granite
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, speckled texture with pink feldspar, gray quartz, and dark mafic minerals; typically Mohs 6–7, vitreous quartz luster, massive structure, and poor or absent cleavage as a whole rock. The surface is strongly weathered and stained, making exact identification uncertain.
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Physical properties
Coarse-grained, speckled texture with pink feldspar, gray quartz, and dark mafic minerals; typically Mohs 6–7, vitreous quartz luster, massive structure, and poor or absent cleavage as a whole rock. The surface is strongly weathered and stained, making exact identification uncertain.
Formation & geological history
An intrusive igneous rock crystallized slowly from silica-rich magma deep in the crust, commonly during Precambrian to younger continental mountain-building events. Weathering has altered the exposed surface and concentrated iron-colored staining.
Uses & applications
Widely used as dimension stone, monuments, paving, countertops, aggregate, and landscaping rock; attractive pink varieties are also sold as decorative building stone.
Geological facts
The pink color commonly comes from potassium feldspar, while dark patches reflect biotite or amphibole. Granite commonly weathers into rounded blocks and sandy grus.
Field identification & locations
Identify it by visible interlocking crystals and abundant pink feldspar, gray quartz, and black mica; unlike sandstone, it has no cemented grains or bedding. Common worldwide, especially in continental shields and mountain ranges.
