igneous
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
Hardness of 6 to 7 on the Mohs scale, colors range from pink to gray depending on feldspar content, vitreous to dull luster, phaneritic (coarse-grained) crystal structure, specific gravity around 2.65 to 2.75.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, colors range from pink to gray depending on feldspar content, vitreous to dull luster, phaneritic (coarse-grained) crystal structure, specific gravity around 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali metal oxides deep beneath the Earth's surface, typically originating during various geological eras from Precambrian to Cenozoic.
Uses & applications
Widely used in construction, architectural facades, monument building, countertops, paving stones, and interior design.
Geological facts
Granite makes up a major part of the Earth's continental crust and is exceptionally durable against weathering compared to many other rocks.
Field identification & locations
Easily identified by its visibly speckled, interlocking crystal texture containing light and dark minerals; found abundantly in mountain ranges and continental shields worldwide.
