igneous
Granite
Phaneritic intrusive igneous rock (mostly Quartz, Feldspar, and Mica)
Phaneritic texture (visible grains), hardness of 6-7 on Mohs scale, salt-and-pepper coloration (grey, white, black), dull to vitreous luster, lacks cleavage as a whole, specific gravity ~2.65-2.75
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Physical properties
Phaneritic texture (visible grains), hardness of 6-7 on Mohs scale, salt-and-pepper coloration (grey, white, black), dull to vitreous luster, lacks cleavage as a whole, specific gravity ~2.65-2.75
Formation & geological history
Formed by the slow crystallization of silica-rich magma deep underground. This process occurs over millions of years within the Earth's crust, typically in continental plates.
Uses & applications
Used extensively in construction for countertops, floor tiles, paving stones, and monuments due to its durability and resistance to weathering.
Geological facts
Granite is the most common rock found in the Earth's continental crust. El Capitan in Yosemite National Park is one of the most famous granite monoliths in the world.
Field identification & locations
Identify in the field by its interlocking crystalline texture where individual minerals like glassy quartz and opaque feldspar are visible to the naked eye. Found in mountain ranges and ancient shield areas.
