igneous
Rounded pink granite pebble
Granite, chiefly quartz–alkali feldspar–plagioclase with biotite or other dark minerals
AI-generated identification · may be incorrectCoarse crystalline texture with pink feldspar, gray quartz, and black mineral grains; typically Mohs 6–7, vitreous-to-dull luster, no consistent cleavage as a whole, and specific gravity about 2.6–2.7.
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Physical properties
Coarse crystalline texture with pink feldspar, gray quartz, and black mineral grains; typically Mohs 6–7, vitreous-to-dull luster, no consistent cleavage as a whole, and specific gravity about 2.6–2.7.
Formation & geological history
An intrusive igneous rock crystallized slowly from silica-rich magma deep underground, commonly during Precambrian to younger continental mountain-building events; rounding indicates later river or glacial transport and abrasion.
Uses & applications
Granite is widely used for building stone, countertops, monuments, aggregate, and paving; this small rounded specimen has mainly educational or decorative value.
Geological facts
The pink color usually comes from potassium feldspar, while the dark specks are commonly biotite or hornblende. The image suggests granite, though exact identification would require a fresh surface or magnification.
Field identification & locations
Identify it by visible interlocking grains, pink feldspar, gray translucent quartz, and dark mica/amphibole; common sources include continental mountain belts and glacial or river gravels worldwide.
