Chromite: The only mineral ore of chromium metal - GeologyChromite is the only ore of chromium, a metal essential for making stainless steel, nichrome, chrome plating, pigments, refractories, chemicals and.chrome ore north,Chromite - WikipediaRefractive index, n = 2.08-2.16. Other characteristics, Weakly magnetic. References. Chromite is an iron chromium oxide: FeCr2O4. It is an oxide mineral belonging to the spinel.