igneous
Pink granite
Granite; chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, pink to gray, with interlocking crystals and glassy quartz; hardness about 6–7, nonmetallic luster, poor cleavage overall, and specific gravity roughly 2.6–2.7.
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Physical properties
Coarse-grained, pink to gray, with interlocking crystals and glassy quartz; hardness about 6–7, nonmetallic luster, poor cleavage overall, and specific gravity roughly 2.6–2.7.
Formation & geological history
An intrusive felsic igneous rock crystallized slowly from silica-rich magma deep in the crust, commonly during Precambrian to Phanerozoic continental mountain-building events.
Uses & applications
Used widely as dimension stone, countertops, monuments, paving, aggregate, and landscaping rock; attractive hand specimens are collected but are generally inexpensive.
Geological facts
The pink color typically comes from potassium feldspar, while translucent gray grains are quartz; dark flecks are usually biotite or amphibole. The specimen may also contain weathering stains or accessory minerals.
Field identification & locations
Identify it by visible interlocking quartz and feldspar crystals, pink coloration, and lack of layering or foliation; common in continental batholiths and exposed mountain terrains worldwide. Confirm with a hardness test: quartz scratches glass.
