Granite. Coarse-grained igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. Fragment from Schneeberg, Germany. Natural History Museum, Berlin, Germany.

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Keywords: -grained, alkali, feldspar, fragment, geologic, geological, geology, germany, granite, granitic, igneous, mineralogy, piece, plagioclase, plutonic, quartz, rock, rocks, schneeberg