= Magnetite = Magnetite is one of the main iron ores, with chemical formula Fe,,3,,O,,4,,. It is one of the oxides of iron, and can be ID'd because it is [[ferrimagnetic]]. == Identification == * Black or brownish * metalic luster * Hardness of 5-6 * Leaves a black streak * magnetic == Location == * Found in sedimentary rocks * Found in [[BIF]]s * Found in lake and marine sediment * Found in beach sand (black sands) == Also see == * [[Hematite]]