igneous
Pink granite (weathered granitic rock)
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, speckled pink-gray rock with visible interlocking crystals and uneven fracture; typically Mohs 6–7, vitreous quartz luster, and no distinct cleavage as a whole. Pink coloration mainly reflects potassium feldspar, while dark grains are mafic minerals.
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Physical properties
Coarse-grained, speckled pink-gray rock with visible interlocking crystals and uneven fracture; typically Mohs 6–7, vitreous quartz luster, and no distinct cleavage as a whole. Pink coloration mainly reflects potassium feldspar, while dark grains are mafic minerals.
Formation & geological history
An intrusive felsic igneous rock formed by slow cooling of silica-rich magma deep in continental crust, commonly during Precambrian to Mesozoic mountain-building events; surface weathering has roughened and stained this specimen.
Uses & applications
Widely used as building stone, countertops, monuments, paving, aggregate, and architectural cladding; ordinary hand specimens have little commercial value.
Geological facts
Granite’s coarse texture records slow underground crystallization. It commonly contains radioactive trace minerals such as zircon and monazite, useful for radiometric dating.
Field identification & locations
Identify it by its pink-white-black, interlocking crystal mosaic, hardness, and lack of layering or fossils; unlike rhyolite, crystals are readily visible. Common worldwide in continental shields and mountain batholiths.
