noun🔗Share长石， feldspar 矿物。 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 granite countertops are made up of quartz, mica, and feldspars. "许多花岗岩台面是由石英、云母和长石类矿物组成的。geologymineralmaterialscienceChat with AIVocabulary GamePractice Reading
