Quartz Feldspar Com

As nouns the difference between feldspar and quartz is that feldspar is mineral 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 quartz is.