igneous
Pink granite
Granite; chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
AI-generated identification · may be incorrectCoarse-grained, speckled pink, gray, and black rock with a granular texture and vitreous-to-dull luster. Hardness is about 6–7 Mohs; crystals are interlocking, with no prominent cleavage as a whole, though feldspar and mica cleave.
Identified More igneous →
Explore Pink granite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Coarse-grained, speckled pink, gray, and black rock with a granular texture and vitreous-to-dull luster. Hardness is about 6–7 Mohs; crystals are interlocking, with no prominent cleavage as a whole, though feldspar and mica cleave.
Formation & geological history
A plutonic igneous rock formed by slow cooling and crystallization of silica-rich magma deep in the crust, commonly during Precambrian to younger continental mountain-building events.
Uses & applications
Used extensively as dimension stone, countertops, monuments, building facing, paving, and aggregate; attractive hand specimens are collected but usually have modest value.
Geological facts
The pink color mainly reflects potassium feldspar, while dark flakes or grains are biotite or amphibole. Weathering commonly produces rounded surfaces and separates feldspar grains.
Field identification & locations
Identify it by visible interlocking crystals: pink feldspar, translucent gray quartz, and black mica or amphibole; it is not attracted to a magnet and does not fizz with dilute acid. Common worldwide in continental shields, batholiths, and exposed mountain cores.
