igneous
Pink granite or granitic pegmatite
Granite; chiefly quartz (SiO₂), potassium feldspar, plagioclase, and minor biotite/amphibole
AI-generated identification · may be incorrectCoarse-grained, pale pink and white with dark specks; vitreous quartz and feldspar luster, interlocking crystals, Mohs hardness about 6–7, poor cleavage overall but feldspar shows cleavage. The image is insufficient to distinguish ordinary granite from a pegmatitic variety confidently.
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Physical properties
Coarse-grained, pale pink and white with dark specks; vitreous quartz and feldspar luster, interlocking crystals, Mohs hardness about 6–7, poor cleavage overall but feldspar shows cleavage. The image is insufficient to distinguish ordinary granite from a pegmatitic variety confidently.
Formation & geological history
Slow cooling of silica-rich magma deep in the crust produced the visible interlocking crystals, commonly during Precambrian to younger continental mountain-building events. Weathering has rounded the specimen.
Uses & applications
Used as dimension stone, countertops, monuments, aggregate, and landscaping rock; attractive pink pieces are collected as mineral specimens.
Geological facts
Pink color generally comes from potassium feldspar, while gray translucent grains are quartz and black grains are biotite or amphibole.
Field identification & locations
Identify it by coarse interlocking pink feldspar, glassy quartz, and dark mica/amphibole; it is common in continental shields, mountain belts, quarries, and glacial gravels. A hand lens and streak/cleavage observations improve identification.
