igneous
Likely gray granite or granitic rock fragment
Granite; primarily quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse, mottled gray appearance with a dull to slightly vitreous luster; typical hardness is about 6–7 Mohs, with poor cleavage overall but feldspar cleavage. The image is too dim and blurred for confident mineral-level identification.
Identified More igneous →
Explore Likely gray granite or granitic rock fragment in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Coarse, mottled gray appearance with a dull to slightly vitreous luster; typical hardness is about 6–7 Mohs, with poor cleavage overall but feldspar cleavage. The image is too dim and blurred for confident mineral-level identification.
Formation & geological history
An intrusive igneous rock formed when silica-rich magma cooled slowly beneath Earth’s surface, commonly during Precambrian to Phanerozoic continental crust formation.
Uses & applications
Used extensively as building stone, countertops, monuments, paving, aggregate, and landscaping material; this small fragment has negligible commercial value.
Geological facts
Visible grain size and gray coloration are consistent with granite, but it could also be weathered gneiss, quartzite, or another common silicate rock.
Field identification & locations
Look for interlocking visible grains: translucent/gray quartz, white or pink feldspar, and dark mica. Common worldwide, especially in continental shields and mountain belts; a fresh, well-lit close-up or hardness/streak tests would improve identification.
