igneous
Granite
Felsic intrusive igneous rock
Hardness of 6 on the Mohs scale. Colors range widely from pink to gray, white, and black depending on the feldspar and quartz content. Luster is typically vitreous to dull. Crystal structure is phaneritic (coarse-grained, visible crystals). Specific gravity ranges from 2.65 to 2.75.
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Physical properties
Hardness of 6 on the Mohs scale. Colors range widely from pink to gray, white, and black depending on the feldspar and quartz content. Luster is typically vitreous to dull. Crystal structure is phaneritic (coarse-grained, visible crystals). Specific gravity ranges from 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 over millions of years.
Uses & applications
Commonly used in construction, monuments, flooring, countertops, and decorative stone.
Geological facts
Granite is the most common intrusive rock of Earth's continental crust and is exceptionally durable against weathering.
Field identification & locations
Easily identified by its visibly speckled, coarse-grained texture containing quartz, feldspar, and mica. Found worldwide in continental shields and mountain ranges.
