( n. )
An iron-black mineral of metallic luster, occurring in small orthorhombic crystals, also massive. It contains sulphur, arsenic, copper, and often silver.
( n. )
An iron-black mineral of metallic luster, occurring in small orthorhombic crystals, also massive. It contains sulphur, arsenic, copper, and often silver.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012