igneous
Rounded pink-gray granite pebble
Granite, a coarse-grained felsic intrusive igneous rock
AI-generated identification · may be incorrectPale pink-gray with visible specks of quartz, feldspar, and dark mica; typically Mohs 6–7, nonmetallic luster, interlocking crystals, and no cleavage as a whole rock. The rounded shape and smooth surface indicate natural abrasion, likely in water or glacial transport.
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Physical properties
Pale pink-gray with visible specks of quartz, feldspar, and dark mica; typically Mohs 6–7, nonmetallic luster, interlocking crystals, and no cleavage as a whole rock. The rounded shape and smooth surface indicate natural abrasion, likely in water or glacial transport.
Formation & geological history
Formed when silica-rich magma cooled slowly underground, allowing visible crystals to grow; granite ranges widely in age and may be billions of years old. The pebble was later rounded by erosion and transport.
Uses & applications
Granite is widely used as dimension stone, paving, countertops, and aggregate; this small pebble is mainly suitable for collecting or landscaping.
Geological facts
Typical minerals are quartz, potassium feldspar, plagioclase, and biotite or other dark minerals.
Field identification & locations
Identify it by its speckled, interlocking grains and pale quartz-and-feldspar-rich appearance; rounded granite pebbles occur in river, beach, and glacial deposits worldwide. A small common specimen generally sells for about $1–$10.
