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Is Plagioclase Feldspar A Mineral

As nouns the difference between feldspar and plagioclase is that feldspar is mineralogy any of a large group of rockforming minerals that, together, make up about 60 of the earths outer crust the feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium feldspars are the principal constituents of igneous and plutonic rocks while plagioclase is.