igneous
Pink granite
Granite, chiefly quartz–feldspar–mica
AI-generated identification · may be incorrectCoarse-grained, holocrystalline intrusive rock with pink potassium feldspar, gray translucent quartz, and black biotite/hornblende. Mohs hardness is about 6–7; vitreous quartz, feldspar cleavage, no foliation, and typical specific gravity of 2.6–2.8.
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Physical properties
Coarse-grained, holocrystalline intrusive rock with pink potassium feldspar, gray translucent quartz, and black biotite/hornblende. Mohs hardness is about 6–7; vitreous quartz, feldspar cleavage, no foliation, and typical specific gravity of 2.6–2.8.
Formation & geological history
Formed when silica-rich magma cooled slowly deep in continental crust, allowing large crystals to grow; specimens commonly range from Precambrian to Mesozoic in age. The image may also represent closely related pink granitic pegmatite or weathered granite.
Uses & applications
Widely used as dimension stone, countertops, monuments, paving, aggregate, and decorative architectural stone; attractive pieces are collected but are usually inexpensive.
Geological facts
Pink coloration generally reflects abundant potassium feldspar, while dark minerals indicate biotite or amphibole. Granite commonly forms large batholiths and is a major component of continental crust.
Field identification & locations
Identify it by its visible interlocking crystals, pink feldspar, quartz, and dark mica, unlike layered or foliated rocks; a steel scratch usually fails on quartz but may mark feldspar. Common worldwide, including India, Brazil, Canada, Scandinavia, and the United States.
