igneous
Pink granite pebble
Granite, a coarse-grained felsic intrusive igneous rock
AI-generated identification · may be incorrectPink to salmon matrix with visible black and pale mineral grains; typically quartz, potassium feldspar, plagioclase, and biotite or hornblende. Mohs hardness about 6–7; granular crystalline texture, vitreous quartz, and no prominent cleavage as a whole rock.
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Physical properties
Pink to salmon matrix with visible black and pale mineral grains; typically quartz, potassium feldspar, plagioclase, and biotite or hornblende. Mohs hardness about 6–7; granular crystalline texture, vitreous quartz, and no prominent cleavage as a whole rock.
Formation & geological history
Formed as silica-rich magma cooled slowly underground, allowing visible crystals to grow. Granite occurs in ancient continental crust across a wide range of geological ages; this pebble was likely rounded by weathering or water transport.
Uses & applications
Granite is widely used for building stone, paving, countertops, and monuments; small pebbles are commonly collected or used decoratively.
Geological facts
Its pink color generally comes from potassium feldspar, while dark flecks are commonly biotite or amphibole.
Field identification & locations
Identify it by its interlocking speckled crystals and mix of pink, light, and dark grains; the photo alone cannot establish its exact source. Similar granite is widespread on continents worldwide.
