igneous
Granodiorite
Phaneritic intrusive igneous rock
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale, mottled gray and white color, vitreous luster, coarse-grained crystal structure, specific gravity around 2.7.
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Physical properties
Hardness 6-7 on Mohs scale, mottled gray and white color, vitreous luster, coarse-grained crystal structure, specific gravity around 2.7.
Formation & geological history
Formed from the slow cooling of magma beneath the Earth's surface, typically found in continental mountain building environments.
Uses & applications
Used extensively in construction, as crushed stone for roadbeds, and occasionally as architectural dimension stone.
Geological facts
Granodiorite is chemically intermediate between granite and diorite. The famous Rosetta Stone is carved from granodiorite.
Field identification & locations
Identify by its balanced mix of light-colored plagioclase feldspar, quartz, and dark biotite or hornblende. Commonly found in major batholiths worldwide.
