noun🔗Share흑운모A dark brown mica; it is a mixed aluminosilicate and fluoride of potassium, magnesium and iron."The shiny black flecks in the granite countertop are likely grains of biotite, a type of mica. "화강암 조리대의 반짝이는 검은 반점은 운모의 일종인 흑운모의 입자일 가능성이 높습니다.geologymineralsubstancematerialchemistryChat with AIVocabulary GamePractice Reading
