igneous
Rounded granite boulder
Granite, a coarse-grained felsic intrusive igneous rock
AI-generated identification · may be incorrectPink feldspar, gray quartz, and dark mica or amphibole form a speckled, interlocking texture. Hardness is about 6–7 Mohs; crystals are mostly visible, with no regular cleavage across the rock.
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Physical properties
Pink feldspar, gray quartz, and dark mica or amphibole form a speckled, interlocking texture. Hardness is about 6–7 Mohs; crystals are mostly visible, with no regular cleavage across the rock.
Formation & geological history
Formed when silica-rich magma cooled slowly underground, allowing coarse crystals to grow; granite bodies occur across many geological ages. The boulder’s rounded shape likely reflects prolonged weathering and transport by water or ice.
Uses & applications
Granite is widely used for building stone, paving, countertops, monuments, and landscaping; this rounded specimen is mainly decorative or collectible.
Geological facts
The pink color commonly comes from potassium feldspar, while quartz contributes the gray or glassy grains.
Field identification & locations
Identify granite by its visible, interlocking quartz, feldspar, and dark mineral grains. It is common in continental crust worldwide; this boulder’s exact source cannot be determined from the image alone.
