igneous
Granite
Phaneritic Felsic Igneous Rock
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale; pink, white, gray, and black mottled colors; vitreous to dull luster; phaneritic (coarse-grained) crystal structure with visible interlocking mineral grains; specific gravity of approximately 2.65 to 2.75.
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Physical properties
Hardness of 6 on the Mohs scale; pink, white, gray, and black mottled colors; vitreous to dull luster; phaneritic (coarse-grained) crystal structure with visible interlocking mineral grains; specific gravity of approximately 2.65 to 2.75.
Formation & geological history
Formed from the slow crystallization of magma deep beneath the Earth's surface over millions of years. It is composed primarily of quartz, alkali feldspar, and plagioclase, with minor amounts of biotite mica and amphibole.
Uses & applications
Widely used in construction, architectural buildings, countertops, flooring, and monumental sculptures due to its durability and aesthetic appeal.
Geological facts
Granite is the most common rock of the Earth's continental crust and is exceptionally resistant to weathering, which is why ancient obelisks and structures made of granite have survived for thousands of years.
Field identification & locations
Easily identified by its characteristic 'salt and pepper' or pink-speckled appearance with visible interlocking crystals. Common worldwide in continental shields and mountain roots.
