igneous
Likely weathered granite or granitic rock
Granite; quartz + feldspar + mica, compositionally variable
AI-generated identification · may be incorrectCoarse-grained, pinkish-brown, and dull to weakly vitreous; likely hardness 6–7 Mohs, with visible pale feldspar/quartz and dark mica. Massive with no obvious cleavage as a whole, though feldspar and mica have cleavage; specific gravity about 2.6–2.7.
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Physical properties
Coarse-grained, pinkish-brown, and dull to weakly vitreous; likely hardness 6–7 Mohs, with visible pale feldspar/quartz and dark mica. Massive with no obvious cleavage as a whole, though feldspar and mica have cleavage; specific gravity about 2.6–2.7.
Formation & geological history
An intrusive igneous rock crystallized slowly from silica-rich magma deep underground, commonly during Precambrian to younger continental crust formation; surface weathering has rounded and darkened this specimen.
Uses & applications
Used widely as dimension stone, countertops, monuments, aggregate, and building material; attractive pieces are collected but this example appears common and low-value.
Geological facts
Granite’s interlocking crystals reflect slow cooling beneath the surface. Pink coloration commonly comes from potassium feldspar, while brown or black specks may be biotite or weathering products.
Field identification & locations
Common in continental mountain belts and exposed shields worldwide; identify it by its coarse interlocking grains and mixed quartz–feldspar–mica appearance, distinguishing it from fine-grained basalt or sandstone.
