igneous
Polished multicolored granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectMottled gray, cream, pink-orange, and black grains with a granular texture and vitreous-to-dull mineral luster. Typical Mohs hardness is about 6–7; interlocking crystals have no consistent cleavage as a rock.
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Physical properties
Mottled gray, cream, pink-orange, and black grains with a granular texture and vitreous-to-dull mineral luster. Typical Mohs hardness is about 6–7; interlocking crystals have no consistent cleavage as a rock.
Formation & geological history
Forms when silica-rich magma cools slowly underground, allowing visible crystals to grow; granite occurs in continental crust and ranges widely in age, from ancient Precambrian bodies to younger intrusions.
Uses & applications
Commonly used for countertops, tiles, paving, monuments, and decorative stone; polished slabs are also collected.
Geological facts
The pale grains are likely quartz and feldspar, while dark patches commonly contain biotite or amphibole; the image alone cannot confirm exact mineral proportions.
Field identification & locations
Identify granite by its visible, interlocking light and dark crystals and lack of layering. It is found worldwide in continental mountain belts and shield regions.
