igneous
Granite
Granite; a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectPale pink, cream, and gray with visible interlocking grains and a granular texture; typical mineral hardness is 6–7 Mohs, with no preferred cleavage at the rock scale. The minerals have vitreous to pearly luster; granite is usually dense and massive.
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Physical properties
Pale pink, cream, and gray with visible interlocking grains and a granular texture; typical mineral hardness is 6–7 Mohs, with no preferred cleavage at the rock scale. The minerals have vitreous to pearly luster; granite is usually dense and massive.
Formation & geological history
Forms when silica-rich magma cools slowly underground, allowing large crystals to grow. Granite bodies occur in continental crust and span a wide range of geological ages.
Uses & applications
Used as dimension stone, countertops, paving, monuments, and crushed aggregate; attractive pieces may be collected or polished.
Geological facts
The photograph shows a weathered, coarse-grained specimen consistent with granite, though an image cannot confirm its mineral composition. Pink coloration commonly comes from potassium feldspar.
Field identification & locations
Look for interlocking visible grains of light-colored quartz and feldspar with darker mica or amphibole; common in continental mountain ranges and ancient shields. A small rough specimen typically has little commercial value.
