igneous
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectPale gray to cream with visible granular crystals and a rough, speckled texture; quartz hardness is 7 Mohs, while feldspars are about 6. Typically nonmetallic and crystalline, with no preferred cleavage across the rock.
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Physical properties
Pale gray to cream with visible granular crystals and a rough, speckled texture; quartz hardness is 7 Mohs, while feldspars are about 6. Typically nonmetallic and crystalline, with no preferred cleavage across the rock.
Formation & geological history
Forms when silica-rich magma cools slowly underground, allowing crystals to grow. Granite occurs in ancient continental crust, with individual bodies ranging widely in geological age.
Uses & applications
Commonly used as crushed aggregate and dimension stone, including countertops, paving, and monuments; small specimens are also collected.
Geological facts
The photo’s small, light-colored, granular specimen is consistent with granite, though exact identification requires closer examination of its minerals.
Field identification & locations
Look for interlocking pale feldspar and glassy quartz grains, often with scattered dark mica; granite is widespread in continental mountain belts and shields. The image alone does not confirm the identification.
