agaten. 瑪瑙、五又二分之一點鉛字瑪瑙149學術名詞瑪瑙:地質學、化學術語、物理學、礦冶工程、材料科學、金屬材料瓊瑤:礦物學、海洋地質學英文釋義an impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and pestles