igneous
Granite-like pebble
Likely granitic rock, composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectSmall, gray-brown, granular specimen with visible light and dark mineral grains; likely hardness about 6–7 Mohs, vitreous to dull luster, interlocking crystalline texture, and no obvious cleavage as a whole rock.
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Physical properties
Small, gray-brown, granular specimen with visible light and dark mineral grains; likely hardness about 6–7 Mohs, vitreous to dull luster, interlocking crystalline texture, and no obvious cleavage as a whole rock.
Formation & geological history
Probably an ordinary fragment of weathered intrusive igneous rock formed when silica-rich magma cooled slowly underground, commonly during Precambrian to Phanerozoic geologic time. Exact age and source cannot be determined from the photograph.
Uses & applications
Common granite is used for crushed stone, aggregate, paving, monuments, countertops, and landscaping; this small fragment has negligible commercial value.
Geological facts
The image is too distant and low-resolution for definitive identification; it could also be a coarse sandstone or another granitic-looking aggregate.
Field identification & locations
Field identification depends on its interlocking visible grains: translucent quartz, pale feldspar, and dark mica or amphibole. Common worldwide, especially in continental shields and exposed intrusive batholiths.
