igneous
Pink granite pebble
Granite, chiefly quartz, alkali feldspar, plagioclase, and minor biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, speckled pink-gray appearance with a dull to slightly granular luster; typical hardness is about 6–7 Mohs, with no preferred cleavage as a whole and density around 2.6–2.7 g/cm³.
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Physical properties
Coarse-grained, speckled pink-gray appearance with a dull to slightly granular luster; typical hardness is about 6–7 Mohs, with no preferred cleavage as a whole and density around 2.6–2.7 g/cm³.
Formation & geological history
An intrusive igneous rock crystallized slowly from silica-rich magma deep in the crust, commonly during Precambrian to younger continental-formation events; this specimen was later rounded by stream or shoreline abrasion.
Uses & applications
Used widely as building stone, countertops, monuments, paving, aggregate, and landscaping rock; small rounded pieces have modest collecting or craft value.
Geological facts
The pink color generally comes from potassium feldspar, while translucent grains are quartz; individual crystals are large enough to see because cooling was slow.
Field identification & locations
Identify it by visible interlocking pink feldspar, gray or clear quartz, and dark mica grains; common in continental mountain belts and glacial or river gravels worldwide.
