igneous
Tumbled pink granite
Granite, chiefly quartz, alkali feldspar, and plagioclase with minor mica/amphibole
AI-generated identification · may be incorrectCoarse crystalline, pink to reddish-brown, mostly opaque, with a dull to slightly vitreous luster; Mohs hardness about 6–7, no consistent cleavage as a whole, and specific gravity roughly 2.63–2.75.
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Physical properties
Coarse crystalline, pink to reddish-brown, mostly opaque, with a dull to slightly vitreous luster; Mohs hardness about 6–7, no consistent cleavage as a whole, and specific gravity roughly 2.63–2.75.
Formation & geological history
An intrusive felsic igneous rock that crystallized slowly from silica-rich magma deep underground, commonly during Precambrian to Phanerozoic mountain-building events; this piece has been naturally or artificially rounded and weathered.
Uses & applications
Widely used for countertops, monuments, building stone, paving, and crushed aggregate; rounded specimens are inexpensive landscaping or collection pieces.
Geological facts
The pink color generally comes from potassium feldspar, while translucent gray grains are quartz and dark flecks may be biotite or amphibole.
Field identification & locations
Identify it by visible interlocking quartz and feldspar grains, pink coloration, and lack of layering or vesicles; common worldwide, especially in continental shields and mountain belts.
