What is copper pyrites, or yellow copper ore; a common ore of opper, containing copper, iron, and sulphur. It occurs massive and in tetragonal crystals of a bright brass yellow color called?

chalcopyrite — Copper pyrites, or yellow copper ore; a common ore of opper, containing copper, iron, and sulphur. It occurs massive and in tetragonal crystals of a bright brass yellow color. (Webster's 1913.)

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