igneous
Pink granite
Granitic rock, chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, pink-and-gray speckled appearance with a granular texture; hardness about 6–7 Mohs, vitreous quartz luster, and no cleavage as a whole. Individual feldspar crystals may show cleavage; specific gravity is typically 2.63–2.75.
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Physical properties
Coarse-grained, pink-and-gray speckled appearance with a granular texture; hardness about 6–7 Mohs, vitreous quartz luster, and no cleavage as a whole. Individual feldspar crystals may show cleavage; specific gravity is typically 2.63–2.75.
Formation & geological history
Slow cooling and crystallization of silica-rich magma deep in continental crust, commonly during Precambrian to Phanerozoic plutonic events. The exposed cobble was likely liberated by weathering and erosion.
Uses & applications
Widely used for countertops, monuments, building stone, paving, and aggregate; small attractive pieces are collected but usually have minimal value.
Geological facts
The pink color generally comes from potassium feldspar, while dark flecks are biotite or amphibole and translucent grains are quartz. Granite is a rock, not a single mineral.
Field identification & locations
Identify it by its visible interlocking crystals, pink feldspar, gray/translucent quartz, and dark mica or amphibole; unlike rhyolite, it is visibly coarse-grained. Common worldwide in continental mountain belts and shield regions.
