igneous
Granite Boulder
Felsic Intrusive Igneous Rock
Hardness: 6-7 on the Mohs scale, Color: Light gray to pink speckled with dark minerals, Luster: Dull to vitreous, Crystal Structure: Phanaritic (coarse-grained visible crystals), Specific Gravity: 2.65 - 2.75
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Physical properties
Hardness: 6-7 on the Mohs scale, Color: Light gray to pink speckled with dark minerals, Luster: Dull to vitreous, Crystal Structure: Phanaritic (coarse-grained visible crystals), Specific Gravity: 2.65 - 2.75
Formation & geological history
Formed from the slow cooling and crystallization of magma rich in silica and alkali metal oxides beneath the Earth's surface over millions of years.
Uses & applications
Widely used in construction, dimension stone, monuments, countertops, and architectural facing.
Geological facts
Granite is a major component of the continental crust and forms many famous geological landmarks, such as El Capitan in Yosemite National Park.
Field identification & locations
Easily identified by its interlocking, visible grains of quartz, feldspar, and mica. Commonly found in continental shield areas and mountain ranges worldwide.
