Hibbingite

Hibbingite is a divalent iron hydroxychloride found in the Duluth Complex of northeastern Minnesota, United States. Hibbingite can be found in troctolitic, partially serpentinized rocks. Hibbingite can also be found in sulfide ore from the Sudbury Complex, Canada, the Noril’sk Intrusion in Russia, and in terrestrially weathered meteorites. Hibbingite is mostly found as vein filings from drill cores taken from troctolitic, partially serpentinized rocks. Hibbingite itself can have cleavage perpendicular to the vein walls in which it is found. Hibbingite is associated with serpentine, olivine, plagioclase, biotite, and secondary magnetite or goethite. Fresh samples are internally green but turn reddish as they oxidize. Hibbingite is part of the atacamite family of minerals.