It occurs as segregation deposits in layered intrusions associated with pentlandite, chalcopyrite and other sulfides. It occurs associated with kamacite, taenite, schreibersite, cohenite, pentlandite and magnetite. Small amounts of pyrite, sphalerite and exsolved pentlandite and chalcopyrite are present with the pyrrhotite. The meteorite contains dolomite, magnesite, magnetite, pentlandite and pyrrhotite. Ore mineralogy includes pyrrhotite, pentlandite, chalcopyrite and pyrite. These black spots have been classified to be those of graphite, pyrrhotite and pentlandite. Associated minerals include&colon; arsenopyrite, barite, silver, cobaltite, pyrrhotite, pentlandite, chalcopyrite, breithauptite and maucherite. They are commonly at the edge and partially enclosed by pentlandite, pyrrhotite or chalcopyrite. The economic minerals associated with this deposit are predominantly pentlandite and chalcopyrite. The CoS compound is known as a very rare cobaltpentlandite (the Co analogue of pentlandite). Millerite is a common metamorphic mineral replacing pentlandite within serpentinite ultramafics. Iron sulfides like pyrrhotite, pentlandite, troilite and cubanite do occur, but elemental iron is absent. It occurs with nickeline, gersdorffite, pentlandite, chalcopyrite, pyrrhotite, galena, tetrahedrite and dyscrasite in hydrothermal deposits. Chalcopyrite, pyrrhotite and pentlandite are deposited throughout shear zones which lack quartz veining. Many igneous rocks also contain the sulfide minerals pyrrhotite and pentlandite.