igneous
Weathered pink granite
Granite, chiefly quartz, potassium feldspar, plagioclase, and biotite
AI-generated identification · may be incorrectCoarse-grained, pink-orange and gray, with a generally granular texture and dull to slightly glassy luster; hardness about 6–7 Mohs, no obvious cleavage as a whole, and density roughly 2.6–2.7 g/cm³.
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Physical properties
Coarse-grained, pink-orange and gray, with a generally granular texture and dull to slightly glassy luster; hardness about 6–7 Mohs, no obvious cleavage as a whole, and density roughly 2.6–2.7 g/cm³.
Formation & geological history
An intrusive igneous rock crystallized slowly from silica-rich magma deep in Earth’s crust, commonly during Precambrian to younger continental crust formation. Its rounded edges and surface indicate weathering or abrasion.
Uses & applications
Widely used as building stone, monuments, countertops, paving, aggregate, and landscape rock; this small weathered specimen has modest collecting value.
Geological facts
Pink coloration usually comes from potassium feldspar, while darker flecks commonly represent biotite or amphibole. Individual mineral grains may be visible with a hand lens.
Field identification & locations
Identify it by its interlocking pink feldspar, translucent gray quartz, and scattered dark minerals; it is common in continental mountain belts and glacially transported gravel. A fresh surface or streak-free hardness test helps distinguish it from sandstone or concrete.
