noun🔗Share장석Any 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. "많은 조리대는 장석을 포함하는 화강암으로 만들어져 얼룩덜룩한 외관을 띕니다.geologymineralmaterialsubstancescienceChat with AIVocabulary GamePractice Reading
