igneous
Pink granite (likely weathered pegmatitic granite)
Granite; chiefly quartz, potassium feldspar, plagioclase, and mica
AI-generated identification · may be incorrectCoarse-grained, pale pink and gray with visible interlocking crystals; glassy quartz, feldspar cleavage, and occasional dark mica. Hardness is about 6–7 Mohs; nonmetallic luster and no consistent cleavage as a whole.
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Physical properties
Coarse-grained, pale pink and gray with visible interlocking crystals; glassy quartz, feldspar cleavage, and occasional dark mica. Hardness is about 6–7 Mohs; nonmetallic luster and no consistent cleavage as a whole.
Formation & geological history
Formed when silica-rich magma cooled slowly deep in the crust, allowing large crystals to grow; commonly Precambrian to Phanerozoic in age. The rough surface reflects natural weathering or minor alteration.
Uses & applications
Used extensively as dimension stone, countertops, monuments, paving, and aggregate; attractive pieces are collected but usually have modest value.
Geological facts
Pink coloration generally comes from potassium feldspar, while translucent gray grains are quartz and dark flecks are biotite or amphibole. A hand lens can reveal the interlocking texture characteristic of granite.
Field identification & locations
Common worldwide, especially in continental mountain belts and exposed batholiths; notable sources include India, Brazil, Finland, and the United States. Identify it by its coarse crystal mosaic, pink feldspar, gray quartz, and lack of layering or foliation.
