igneous
Uncertain—likely weathered granite or quartz-rich rock
Granite (quartz–feldspar–mica aggregate), tentative
AI-generated identification · may be incorrectCoarse, pale gray-white and tan, with granular texture and dull to slightly vitreous luster; chiefly quartz and feldspar with minor mica. Typical hardness is about 6–7 Mohs, with no obvious cleavage on the rounded surface; specific gravity roughly 2.6–2.7.
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Physical properties
Coarse, pale gray-white and tan, with granular texture and dull to slightly vitreous luster; chiefly quartz and feldspar with minor mica. Typical hardness is about 6–7 Mohs, with no obvious cleavage on the rounded surface; specific gravity roughly 2.6–2.7.
Formation & geological history
Likely an intrusive igneous rock formed by slow cooling of silica-rich magma deep underground, commonly Precambrian to Phanerozoic in age, then rounded by weathering or transport.
Uses & applications
Granite is widely used for construction aggregate, monuments, countertops, and decorative stone; small pieces have modest collecting value.
Geological facts
The photograph is not detailed enough for a confident species-level identification; the specimen could also be a weathered quartz-feldspar fragment or another pale igneous rock.
Field identification & locations
Look for interlocking visible grains, glassy quartz, blocky feldspar, and possible dark mica; a streak test, fresh break, hardness test, and close-up image would improve identification. Common worldwide, especially continental shields and mountain belts.
