igneous
Weathered granite (likely pink granite)
Granite; chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, pale pink-gray rock with visible interlocking crystals and rusty weathering; quartz has Mohs hardness 7, feldspar 6, and mica 2–3. It has a generally massive structure, vitreous quartz luster, and indistinct cleavage as a whole.
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Physical properties
Coarse-grained, pale pink-gray rock with visible interlocking crystals and rusty weathering; quartz has Mohs hardness 7, feldspar 6, and mica 2–3. It has a generally massive structure, vitreous quartz luster, and indistinct cleavage as a whole.
Formation & geological history
An intrusive felsic igneous rock formed when silica-rich magma cooled slowly deep underground, commonly during Precambrian to Phanerozoic continental crust formation. The rounded shape and surface discoloration indicate prolonged physical and chemical weathering.
Uses & applications
Used extensively for building stone, monuments, countertops, paving, and aggregate; attractive pieces may be collected as landscape or teaching specimens.
Geological facts
Pink coloration usually comes from potassium feldspar, while orange-brown patches commonly represent iron-oxide staining. Granite commonly weathers into rounded “corestones” through joint-controlled spheroidal weathering.
Field identification & locations
Identify it by coarse interlocking quartz and feldspar grains, lack of layering, and hardness—steel usually cannot scratch quartz. Common worldwide, especially in continental mountain belts and shield regions.
