igneous
Granite
Felsic intrusive igneous rock
Hardness of 6 on the Mohs scale. Colors range from pink, white, gray, to black depending on mineral content. Vitreous to dull luster. Composed mainly of quartz, alkali feldspar, and plagioclase, with minor micas and amphiboles. Specific gravity is approximately 2.65 to 2.75.
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Physical properties
Hardness of 6 on the Mohs scale. Colors range from pink, white, gray, to black depending on mineral content. Vitreous to dull luster. Composed mainly of quartz, alkali feldspar, and plagioclase, with minor micas and amphiboles. Specific gravity is approximately 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali metal oxides deep underground, typically during various geological eras from Precambrian to Cenozoic.
Uses & applications
Widely used in construction for countertops, floor tiles, paving, and monuments due to its high durability and aesthetic appeal.
Geological facts
Granite is the most common intrusive rock of Earth's continental crust and forms the core of many mountain ranges.
Field identification & locations
Easily identified by its visible interlocking crystals of quartz, feldspar, and dark minerals. Found globally in continental shields and intrusive plutons.
