igneous
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectLight gray and speckled, with visible interlocking mineral grains and a dull, unpolished surface. Typical hardness is about 6–7 Mohs; individual mineral grains have distinct crystal structures and cleavage.
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Physical properties
Light gray and speckled, with visible interlocking mineral grains and a dull, unpolished surface. Typical hardness is about 6–7 Mohs; individual mineral grains have distinct crystal structures and cleavage.
Formation & geological history
Forms when silica-rich magma cools slowly beneath the surface, allowing large crystals to grow. Granite occurs across 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 pale grains are likely feldspar and quartz, while darker flecks may be mica or other accessory minerals.
Field identification & locations
Identify it by its coarse, interlocking crystals and mix of light and dark grains; it is common in continental crust and exposed mountain belts. The image alone cannot establish its exact locality or age.
