noun🔗Share橄欖石Any of a group of olive green magnesium-iron silicate minerals that crystallize in the orthorhombic system."The volcanic rock contained sparkling green crystals of olivine. "その火山岩には、キラキラ光る緑色の橄欖石の結晶が含まれていた。mineralgeologymaterialsubstanceChat with AIVocabulary GamePractice Reading
