igneous
Rounded granite pebble
Granite, chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectPinkish tan with dark mineral flecks and a granular texture; likely Mohs 6–7, with a dull to slightly glassy luster. Granite has interlocking crystals and no cleavage as a whole; exact composition cannot be confirmed from the image.
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Physical properties
Pinkish tan with dark mineral flecks and a granular texture; likely Mohs 6–7, with a dull to slightly glassy luster. Granite has interlocking crystals and no cleavage as a whole; exact composition cannot be confirmed from the image.
Formation & geological history
Formed when silica-rich magma cooled slowly underground, allowing visible crystals to grow; granite bodies occur in rocks of many geological ages. Its smooth, rounded shape likely developed through prolonged abrasion in water or other transport.
Uses & applications
Granite is widely used as dimension stone, paving, countertops, and aggregate; this small pebble is mainly decorative or a teaching/collecting specimen.
Geological facts
Pink color commonly comes from potassium feldspar, while dark specks are often biotite or amphibole.
Field identification & locations
Look for a coarse, interlocking mix of pink or white feldspar, translucent quartz, and dark minerals. Rounded granite pebbles occur in streambeds, beaches, and glacial deposits worldwide.
