Chalcopyrite

Chalcopyrite  is a copper iron sulfide mineral and the most abundant copper ore mineral. It has the chemical formula CuFeS₂ and crystallizes in the tetragonal system. It has a brassy to golden yellow color and a hardness of 3.5 to 4 on the Mohs scale. Its streak is diagnostic as green tinged black.  Chalcopyrite (also sometimes known as Fool's Gold) is a high grade copper ore.

On exposure to air, chalcopyrite tarnishes to a variety of oxides, hydroxides, and sulfates. Associated copper minerals include the sulfides bornite (Cu₅FeS₄), chalcocite (Cu₂S), covellite (CuS), digenite (Cu₉S₅); carbonates such as malachite and azurite, and rarely oxides such as cuprite (Cu₂O). Is rarely found in association with native copper. Chalcopyrite is a conductor of electricity.

Chalcopyrite is a positive stone that increases happiness and self-confidence. Chalcopyrite also assists in finding lost objects.