igneous
Granite
Felsic intrusive igneous rock
Mohs hardness of 6-7; colors range from pink to gray depending on feldspar content; dull to glassy luster; phaneritic (coarse-grained) crystal structure with visible quartz, feldspar, and mica crystals; specific gravity of 2.65-2.75.
Identified More igneous →
Explore Granite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness of 6-7; colors range from pink to gray depending on feldspar content; dull to glassy luster; phaneritic (coarse-grained) crystal structure with visible quartz, feldspar, and mica crystals; specific gravity of 2.65-2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali metal oxides beneath the Earth's surface over millions of years.
Uses & applications
Commonly used in construction, architectural buildings, monuments, countertops, and decorative aggregate.
Geological facts
Granite makes up a major part of the Earth's continental crust and is exceptionally durable against weathering.
Field identification & locations
Easily identified by its speckled pink, white, and black crystalline appearance. Found worldwide in major mountain ranges and continental shields.
