Formula: (Fe,Ni)9S8 Isometric
Description: Pentlandite is a bronzy metallic mineral found intergrown with other sulfides such as pyrrhotite and pyrite.
ASHLAND COUNTY: Pentlandite is found intergrown with chalcopyrite, pyrrhotite, cubanite and other minerals in copper-nickel massive sulfide body in the Mineral Lake area (N. 1/2 sec. 30 and E 1/2 sec. 21 T.45N. R.4W.) (Bakheit, 1981).