igneous
Granite with Biotite and Iron Oxide
Felsic intrusive igneous rock
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale, varying colors of gray and pink with dark mica flakes, sub-metallic to vitreous luster, crystalline granular structure.
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Physical properties
Hardness 6-7 on Mohs scale, varying colors of gray and pink with dark mica flakes, sub-metallic to vitreous luster, crystalline granular structure.
Formation & geological history
Formed from the slow cooling of magma rich in silica beneath the Earth's surface over millions of years.
Uses & applications
Commonly used in construction, architectural building facades, countertops, and decorative monuments.
Geological facts
Granite forms the core of many major mountain ranges and is the most abundant rock in Earth's continental crust.
Field identification & locations
Identify by visible interlocking crystals of quartz, feldspar, and dark biotite; found globally in continental shields.
