Copper Iron Sulfide is commonly & quickly available in all volumes. It is also popularly known as copper pyrite & copper sulfide. Copper Iron sulphide chemical composition is CuFeS2. Chalcopyrite (or copper pyrite), looks like, and is easily confused withÂ Pyrite, FeS2. Chalcopyrite is one of the minerals refered to as "Fool's Gold" because of its bright golden color. The Copper Iron Sulphide is again a compound used as a friction material in a number of industries.The large quantities and widespread distribution of chalcopyrite make it the leading source of copper. Chalcopyrite is a common mineral and is found in almost all sulfide deposits.