noun🔗ShareFeldspatAny of a large group of rock-forming minerals that, together, make up about 60% of the earth's 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."The granite countertop sparkled in the sunlight because it contained small crystals of felspar. "Die Granit-Arbeitsplatte funkelte im Sonnenlicht, weil sie kleine Kristalle von Feldspat enthielt.geologymineralmaterialsubstancechemistryscienceChat with AIVocabulary GamePractice Reading
