igneous
Granite
Intrusive Igneous Rock
Hardness of 6 on the Mohs scale; usually pink, white, gray, or black with visible interlocking mineral grains; dull to vitreous luster; massive crystal structure; specific gravity around 2.65 to 2.75.
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Physical properties
Hardness of 6 on the Mohs scale; usually pink, white, gray, or black with visible interlocking mineral grains; dull to vitreous luster; massive crystal structure; specific gravity around 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling and crystallization of magma rich in silica and alkali feldspar deep beneath the Earth's surface, typically over millions of years.
Uses & applications
Widely used in construction, architecture, countertops, monuments, and as crushed stone for roadbeds.
Geological facts
Granite makes up a major part of continental crust and is one of the most durable natural building stones known to humanity, resistant to weathering.
Field identification & locations
Identified by its distinctly speckled, coarse-grained appearance containing quartz, feldspar, and mica. Commonly found in mountainous regions and shield areas worldwide.
