igneous
Granite paving stone
Granite, a coarse-grained felsic intrusive igneous rock
AI-generated identification · may be incorrectSpeckled gray, white, and dark minerals with a granular texture; chiefly quartz, feldspar, and mica. Typical hardness is 6–7 Mohs; crystals are interlocking, with no preferred cleavage at the rock scale.
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Physical properties
Speckled gray, white, and dark minerals with a granular texture; chiefly quartz, feldspar, and mica. Typical hardness is 6–7 Mohs; crystals are interlocking, with no preferred cleavage at the rock scale.
Formation & geological history
Magma cooled slowly underground, allowing visible crystals to form; granites occur across a wide range of geological ages. The image appears to show a weathered or paved granite surface.
Uses & applications
Commonly used for paving, building stone, countertops, monuments, and aggregate.
Geological facts
Granite’s visible grains are typically quartz and feldspar with darker biotite or amphibole; the small white object on the surface is not identifiable as part of the rock.
Field identification & locations
Look for a hard, mottled surface with interlocking light and dark grains; quartz resists scratching by a steel knife. Granite is widespread in continental crust and is quarried globally.
