= Hematite = Hematite is a common iron ore, with chemical forumla Fe,,2,,O,,3,,. Hematite is electrically conductive and is harder than pure iron. == Identification == * Gray, black, steel, silver-gray, brown, reddish brown * Metalic luster (in darker color varieties) == Location == * Gray is found near * standing water * mineral hot springs * Found in some soil