igneous
Granite
Felsic intrusive igneous rock
Hardness: 6-7 on the Mohs scale, Color: Pink, white, grey, or black speckled, Luster: Vitreous to dull, Crystal structure: Phaneritic (coarse-grained visible crystals), Specific gravity: 2.65-2.75
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Physical properties
Hardness: 6-7 on the Mohs scale, Color: Pink, white, grey, or black speckled, Luster: Vitreous to dull, Crystal structure: Phaneritic (coarse-grained visible crystals), Specific gravity: 2.65-2.75
Formation & geological history
Formed from the slow cooling and solidification of magma deep beneath the Earth's surface, typically composed mainly of quartz, alkali feldspar, and plagioclase.
Uses & applications
Widely used in construction, buildings, monuments, paving, countertops, and interior tiles due to its durability and aesthetic appeal.
Geological facts
Granite is the most common rock of the Earth's continental crust and is frequently found in major mountain ranges. The interlocking crystals make it extremely strong and resistant to weathering.
Field identification & locations
Easily identified by its distinct speckled appearance with visible interlocking grains of quartz, feldspar, and dark minerals like biotite mica. Found globally in shields and orogenic belts.
