igneous
Rounded pink granite or granitic river pebble
Granite; mainly quartz (SiO₂), alkali feldspar, plagioclase, and minor mica/iron oxides
AI-generated identification · may be incorrectFine-to-medium-grained, salmon-pink and cream, with a dull to slightly sugary luster; likely Mohs 6–7, nonfoliated, with no obvious cleavage on the rounded surface. The smooth shape indicates prolonged water or beach abrasion.
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Physical properties
Fine-to-medium-grained, salmon-pink and cream, with a dull to slightly sugary luster; likely Mohs 6–7, nonfoliated, with no obvious cleavage on the rounded surface. The smooth shape indicates prolonged water or beach abrasion.
Formation & geological history
Granite crystallizes slowly from silica-rich magma deep in continental crust, commonly during Precambrian to Phanerozoic plutonic events; this pebble was later weathered from an outcrop and transported. Exact identification and age require a fresh broken surface or testing.
Uses & applications
Common granite is used for building stone, countertops, monuments, aggregate, and landscaping; this small rounded specimen has mainly decorative or educational value.
Geological facts
The pink color typically comes from potassium feldspar, while darker specks may be biotite or amphibole and pale grains quartz. The photograph does not resolve the grain texture well enough to exclude pink quartzite or arkosic sandstone.
Field identification & locations
Look for interlocking visible grains, glassy gray quartz, pink feldspar, and scattered dark mica; a streak test is unhelpful, while a steel file should barely scratch it. Rounded granite pebbles occur in rivers, glacial deposits, beaches, and landscaping gravel worldwide.
