igneous
Pink granite
Granite, composed mainly of quartz, potassium feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, speckled pink, gray, white, and black; typically Mohs 6–7, with vitreous quartz and feldspar luster, no strong cleavage as a whole, and specific gravity about 2.63–2.75.
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Physical properties
Coarse-grained, speckled pink, gray, white, and black; typically Mohs 6–7, with vitreous quartz and feldspar luster, no strong cleavage as a whole, and specific gravity about 2.63–2.75.
Formation & geological history
An intrusive felsic igneous rock formed when silica-rich magma cooled slowly deep underground, commonly within Precambrian to Mesozoic plutons; exact age cannot be determined from the image.
Uses & applications
Widely used for building stone, countertops, monuments, paving, and aggregate; attractive polished pieces have modest collecting value.
Geological facts
The pink color usually comes from potassium feldspar, while dark grains are commonly biotite or amphibole. Visible interlocking crystals and lack of layering distinguish it from sandstone or slate.
Field identification & locations
Identify it by its granular interlocking texture, abundant light minerals, pink feldspar, gray quartz, and scattered black mica/amphibole; common worldwide, especially in continental mountain belts.
