noun🔗Share长石, feldspat。 Any 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. "这块花岗岩台面在阳光下闪闪发光，因为它含有细小的长石晶体。geologymineralmaterialsubstancechemistryscienceChat with AIVocabulary GamePractice Reading
