igneous
Pink granite (likely pink pegmatitic granite)
Granite; chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, pink-and-gray rock with glassy quartz, salmon-pink feldspar, and dark mica or amphibole; Mohs hardness about 6–7, nonmetallic luster, massive texture, and no prominent cleavage as a whole. The image suggests weathered, unpolished granite, though exact identification is limited by scale and lighting.
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Physical properties
Coarse-grained, pink-and-gray rock with glassy quartz, salmon-pink feldspar, and dark mica or amphibole; Mohs hardness about 6–7, nonmetallic luster, massive texture, and no prominent cleavage as a whole. The image suggests weathered, unpolished granite, though exact identification is limited by scale and lighting.
Formation & geological history
A plutonic igneous rock crystallized slowly from silica-rich magma deep in Earth’s crust, commonly during Precambrian to younger continental mountain-building events. Its large interlocking crystals reflect slow cooling.
Uses & applications
Widely used as dimension stone, countertops, monuments, curbing, paving, aggregate, and decorative stone; small pieces are common teaching or collecting specimens rather than gemstones.
Geological facts
Pink color generally comes from potassium feldspar, while black grains are biotite or hornblende. Granite commonly forms resistant uplands and distinctive rounded boulders through spheroidal weathering.
Field identification & locations
Identify it by visible interlocking grains, abundant pink feldspar, gray translucent quartz, and scattered black minerals; it should not fizz with dilute acid. Common worldwide, including India, Brazil, Scandinavia, Canada, and the United States.
