igneous
Granite (weathered, rounded fragment)
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectTypically coarse-grained, speckled pink, white, gray, and black; vitreous quartz and blocky feldspar show no preferred layering. Mohs hardness is about 6–7, with little visible cleavage as a whole rock and specific gravity near 2.6–2.7.
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Physical properties
Typically coarse-grained, speckled pink, white, gray, and black; vitreous quartz and blocky feldspar show no preferred layering. Mohs hardness is about 6–7, with little visible cleavage as a whole rock and specific gravity near 2.6–2.7.
Formation & geological history
A pale-colored intrusive igneous rock crystallized slowly from silica-rich magma deep in the crust, commonly during Precambrian to Phanerozoic mountain-building events. The rounded shape and surface alteration likely reflect weathering or transport.
Uses & applications
Widely used as building stone, countertops, monuments, paving, aggregate, and decorative landscaping material; ordinary fragments have negligible jewelry value.
Geological facts
The image shows a small coarse-grained felsic rock with pink feldspar and dark mafic minerals, consistent with granite, though exact identification would require a fresh surface or testing.
Field identification & locations
Common in continental crust and exposed in mountain belts worldwide, including India, Brazil, Canada, Scandinavia, and the United States. Identify it by interlocking visible grains of quartz, feldspar, and dark mica/amphibole, without foliation.
