( n. )
An iron-potash mica, of a raven-black color, usually found in granitic rocks in small six-sided tables, or as an aggregation of minute opaque scales. See Mica.
( n. )
An iron-potash mica, of a raven-black color, usually found in granitic rocks in small six-sided tables, or as an aggregation of minute opaque scales. See Mica.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012