igneous
Weathered pink granite
Granite, chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, mottled pink-gray rock with a granular texture and likely alkali feldspar, quartz, and dark mica/amphibole. Mohs hardness about 6–7; vitreous quartz and feldspar luster, no obvious cleavage at specimen scale, density roughly 2.6–2.7 g/cm³.
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Physical properties
Coarse-grained, mottled pink-gray rock with a granular texture and likely alkali feldspar, quartz, and dark mica/amphibole. Mohs hardness about 6–7; vitreous quartz and feldspar luster, no obvious cleavage at specimen scale, density roughly 2.6–2.7 g/cm³.
Formation & geological history
Intrusive igneous rock formed by slow cooling of silica-rich magma deep in continental crust, commonly during Precambrian to Phanerozoic mountain-building events. Surface weathering rounded and dulled the specimen.
Uses & applications
Widely used as dimension stone, countertops, paving, monuments, aggregate, and decorative landscaping rock; this weathered hand specimen has minimal commercial value.
Geological facts
The pink color generally comes from potassium feldspar, while gray translucent grains are quartz. Individual minerals can often be scratched only with harder steel or a quartz point.
Field identification & locations
Common in continental shields and mountain belts worldwide, including India, Brazil, Scandinavia, Canada, and the United States. Identify by its visible interlocking quartz-feldspar-mica grains and lack of layering or fossils; a fresh surface is more diagnostic than the weathered exterior.
