igneous
Pink granite
Felsic intrusive igneous rock; predominantly potassium feldspar, quartz, and biotite/hornblende
AI-generated identification · may be incorrectHardness about 6–7 Mohs; pink, gray, and black granular texture with vitreous quartz and feldspar luster. Crystals are interlocking and generally lack cleavage as a rock, though feldspar grains cleave.
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Physical properties
Hardness about 6–7 Mohs; pink, gray, and black granular texture with vitreous quartz and feldspar luster. Crystals are interlocking and generally lack cleavage as a rock, though feldspar grains cleave.
Formation & geological history
Slow cooling of silica-rich magma deep underground produced coarse crystals, typically during Precambrian to Phanerozoic mountain-building events. The rounded shape appears tumbled or naturally weathered.
Uses & applications
Commonly used for dimension stone, countertops, monuments, aggregate, and decorative tiles; small pieces are inexpensive geological specimens.
Geological facts
The pink color usually comes from potassium feldspar, while black flecks are commonly biotite mica or hornblende. Exact identification is limited by the small, worn specimen and image alone.
Field identification & locations
Identify by its coarse interlocking grains, pink feldspar, translucent gray quartz, and black mica; it should not fizz with dilute hydrochloric acid. Common worldwide, especially in shield regions and continental mountain belts.
