Magnetite iron refers to iron in ferromagnetic iron minerals, and its content should be determined based on the results of iron ore phase analysis. Can be abbreviated as mFe. In geological surveys, the percentage of magnetic iron in total iron in iron ore is a criterion for evaluating the industrial value of iron ore deposits and classifying the type of ore industry.
Octahedron crystal form, black, black streaks, non-cleavage, strong magnetism. This can be distinguished from similar minerals such as chromite, wolframite, and hematite.