igneous
Rounded pink granite pebble
Granite, a coarse-grained felsic intrusive igneous rock
AI-generated identification · may be incorrectPink, cream, and dark mineral speckles with a granular texture and no visible layering. Typically Mohs 6–7; composed mainly of quartz, feldspar, and mica, with a vitreous quartz luster and no consistent cleavage as a whole rock.
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Physical properties
Pink, cream, and dark mineral speckles with a granular texture and no visible layering. Typically Mohs 6–7; composed mainly of quartz, feldspar, and mica, with a vitreous quartz luster and no consistent cleavage as a whole rock.
Formation & geological history
Crystallized slowly from silica-rich magma deep in the crust, allowing visible interlocking crystals to form. Its exact age cannot be determined from the image; granites range from Archean to recent geologic ages.
Uses & applications
Granite is used for building stone, countertops, paving, and monuments; this small rounded specimen is mainly suitable for collecting or decoration.
Geological facts
The pink color commonly comes from potassium feldspar, while dark flecks are often biotite or other mafic minerals.
Field identification & locations
Identify it by its interlocking, speckled crystals of light feldspar and quartz with darker grains. Granite is widespread in continental crust; the smooth rounded shape suggests natural water or beach abrasion, or tumbling.
