granite felsic intrusive plutonic igneous rock nature background |
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| navigate by keyword : acid background biotite black boulder close coal dark essential feldspar felsic geology granite gray hard igneous intrusive macro main mediumtocoarsegrained mica mineral minerals muscovite natural nature nobody object occur ore pebble plutonic quartz rough silvery single solid stone texture |
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| Granite is a medium-tocoarse-grained acid igneous rock with essential quartz and feldspar. Its three main minerals are feldspar, quartz, and mica, which occur as silvery muscovite or dark biotite or both. |
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