igneous
Granite
Granite; chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, pale gray-white rock with scattered pink and dark mineral grains; quartz hardness 7, feldspar about 6, mica 2–3. Typically has a nonmetallic, glassy-to-dull luster and interlocking crystals with no cleavage across the whole rock.
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Physical properties
Coarse-grained, pale gray-white rock with scattered pink and dark mineral grains; quartz hardness 7, feldspar about 6, mica 2–3. Typically has a nonmetallic, glassy-to-dull luster and interlocking crystals with no cleavage across the whole rock.
Formation & geological history
Likely a coarse-grained intrusive igneous rock formed as silica-rich magma cooled slowly underground. Granite occurs in ancient continental crust, with ages spanning much of Earth’s geological history.
Uses & applications
Used as building and paving stone, countertops, monuments, and decorative aggregate; suitable specimens are collected as teaching or display rocks.
Geological facts
Granite’s visible grains reflect slow cooling, which allowed crystals to grow. The pictured specimen appears granite-like, though a photo cannot confirm its exact composition.
Field identification & locations
Look for interlocking light quartz and feldspar grains with smaller dark mica or other minerals; common in continental mountain regions worldwide. The specimen’s rough texture and pale color fit granite.
