igneous
Granite fragment (likely weathered granitic rock)
Granite; predominantly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, pale gray to whitish with dark mica; vitreous quartz and pearly mica luster. Hardness about 6–7 Mohs, nonfoliated, with irregular fracture and feldspar cleavage; specific gravity roughly 2.6–2.7.
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Physical properties
Coarse-grained, pale gray to whitish with dark mica; vitreous quartz and pearly mica luster. Hardness about 6–7 Mohs, nonfoliated, with irregular fracture and feldspar cleavage; specific gravity roughly 2.6–2.7.
Formation & geological history
A slowly cooled intrusive igneous rock formed from magma deep in Earth’s crust, commonly during Precambrian through Phanerozoic continental-crust events. The specimen appears weathered and naturally broken.
Uses & applications
Used extensively as dimension stone, countertops, monuments, paving, aggregate, and landscaping material; small pieces have modest educational or collector interest.
Geological facts
Visible sparkling flakes are likely biotite or muscovite mica, while translucent grains may be quartz. The image resolution prevents confident separation from pegmatite or granitic gneiss.
Field identification & locations
Common in continental mountain belts and exposed bedrock regions worldwide. Identify it by interlocking visible crystals of light feldspar/quartz and dark mica; unlike gneiss, granite generally lacks mineral banding.
