igneous
Weathered granite
Granite; interlocking quartz, feldspar, and mica minerals
AI-generated identification · may be incorrectCoarse-grained, pinkish tan rock with visible light feldspar/quartz and dark biotite or hornblende; vitreous quartz and feldspar luster, Mohs hardness about 6–7, no strong cleavage as a rock, and specific gravity around 2.6–2.7.
Identified More igneous →
Explore Weathered granite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Coarse-grained, pinkish tan rock with visible light feldspar/quartz and dark biotite or hornblende; vitreous quartz and feldspar luster, Mohs hardness about 6–7, no strong cleavage as a rock, and specific gravity around 2.6–2.7.
Formation & geological history
An intrusive igneous rock formed when silica-rich magma cooled slowly deep underground, commonly during Precambrian to younger continental-crust events. The surface appears weathered and iron-stained.
Uses & applications
Widely used as dimension stone, countertops, monuments, paving, aggregate, and building stone; ordinary hand specimens usually have little commercial value.
Geological facts
The pink color commonly comes from potassium feldspar, while dark flecks are mafic minerals. Its coarse texture records slow underground cooling.
Field identification & locations
Identify it by its visible interlocking crystals, pink/white/gray color, and hardness; it should scratch glass and resist a steel knife. Common worldwide in continental mountain ranges and shield regions.
