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."Many countertops are made with granite, which contains feldspar, giving them their speckled appearance. "许多台面是用花岗岩制成的，花岗岩中含有长石，这使得台面呈现出斑驳的外观。geologymineralmaterialsubstancescienceChat with AIVocabulary GamePractice Reading
