igneous
Weathered granite or granitic rock
Granite; chiefly quartz (SiO₂), feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, pale tan to pink, with a granular texture and dull to slightly glassy mineral luster. Typical hardness is about 6–7 Mohs; quartz has no cleavage, while feldspar shows cleavage, and specific gravity is roughly 2.6–2.7.
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Physical properties
Coarse-grained, pale tan to pink, with a granular texture and dull to slightly glassy mineral luster. Typical hardness is about 6–7 Mohs; quartz has no cleavage, while feldspar shows cleavage, and specific gravity is roughly 2.6–2.7.
Formation & geological history
An intrusive igneous rock formed when silica-rich magma slowly crystallized deep underground, commonly during Precambrian to Phanerozoic geological periods. The rounded, brown surface likely reflects weathering and iron staining.
Uses & applications
Used extensively as dimension stone, countertops, monuments, aggregate, and decorative material; ordinary small specimens have little commercial value.
Geological facts
Granite is identified by visible interlocking grains of light quartz and feldspar with darker mica or amphibole. Its exact variety cannot be confirmed confidently from this image alone.
Field identification & locations
Common worldwide, especially in continental mountain belts and exposed shield regions. Look for hard, interlocking grains, pink or white feldspar, gray translucent quartz, and occasional black mica; a hand lens helps distinguish it from sandstone.
