Primary minerals are chalcopyrite, pyrrhotite and arsenopyrite. Many igneous rocks also contain the sulfide minerals pyrrhotite and pentlandite. The deposit is a massive sulfide, composed mainly of pyrrhotite and magnetite. This is due to the oxidation of the tailings (usually sulfide minerals like Pyrrhotite). These black spots have been classified to be those of graphite, pyrrhotite and pentlandite. Here, sparse massive veinlets of arsenopyrite with minor chalcopyrite, pyrite and pyrrhotite are present. It is the iron rich endmember of the pyrrhotite group. Nickel was discovered with widespread pyrrhotite in sheared mafic rocks. They are commonly at the edge and partially enclosed by pentlandite, pyrrhotite or chalcopyrite. Ore consists mainly of sphalerite, galena, chalcopyrite, and pyrrhotite in andradite skarn. This includes iron ore, magnetite, hematite, and often pyrrhotite. Associated minerals include metavivianite, ludlamite, pyrite, siderite and pyrrhotite. It occurs in high temperature hydrothermal deposits with pyrrhotite and chalcopyrite. The saturation magnetization of pyrrhotite is 0.12 tesla. Sulfide minerals such as pyrite (FeS) and pyrrhotite (FeS) occur in many ore deposits.