Chromite [(Mg, Fe)Cr2O4] is found in Peridotite from the Earth's mantle. It also occurs in layered ultramafic intrusive rocks. In addition, it is found in metamorphic rocks such as some serpentinites. Is there any importance of chromite-spinel to explain seismic discontinuity at earth transition zone? Or, To explain any other geological feature of earth?
Chromite was also found in the Suizhou meteorite. So, how important is it to explain the geology of other planetary bodies?