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What is the grain size of granite?

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Quick Answer

Granite typically has a large and coarse grain size with highly visible crystals. It is able to grow large crystals due to being an intrusive igneous rock.

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Full Answer

Granite is formed underground from felsic lava over a lengthy period of time, which results in the formation of large mineral crystals. It has a high quartz and feldspar content. The minerals found in granite are typically light-colored and may vary depending on which minerals are prevalent. Trace minerals such as mica and amphiboles also affect the color and composition of the rock. Granite is the most commonly found igneous rock in the continental crust and the Earth's surface.

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