igneous
Red Granite
Felsic intrusive igneous rock
AI-generated identification · may be incorrectMohs hardness of 6-7, dominated by pink-to-red K-feldspar, quartz, and dark biotite or amphibole. Vitreous to dull luster with a phaneritic, coarse-grained crystalline texture.
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Physical properties
Mohs hardness of 6-7, dominated by pink-to-red K-feldspar, quartz, and dark biotite or amphibole. Vitreous to dull luster with a phaneritic, coarse-grained crystalline texture.
Formation & geological history
Formed through the slow, intrusive cooling of silica-rich magma deep beneath Earth's crust over millions of years.
Uses & applications
Widely used in architectural building facades, dimension stone, kitchen countertops, and monument construction.
Geological facts
The distinct red color comes from an abundance of potassium feldspar crystals during cooling. It forms the core of many major mountain ranges globally.
Field identification & locations
Identify in the field by interlocking visible crystals of pink feldspar, clear quartz, and dark mica. Common worldwide in continental shields and intrusive plutons.
