Noun
Copper pyrites, or yellow copper ore; a common ore of copper, containing copper, iron, and sulphur. It occurs massive and in tetragonal crystals of a bright brass yellow color.
Source: Webster's dictionaryDespite its name a chalcopyrite does not contain dianion pairs, but single S 2− sulfide anions. Source: Internet
The sheath is decorated by fish skin, the yellow and white parts are mixed by chalcopyrite and copper. Source: Internet