What is "loveringite"

n. (context mineralogy English) A trigonal-rhombohedral black mineral containing aluminum, calcium, cerium, chromium, iron, magnesium, oxygen, titanium, vanadium, and zirconium.

Loveringite is a rare metallic oxide mineral of the crichtonite group with the chemical formula (Ca,Ce)(Ti,Fe,Cr,Mg)O. It is a late-stage magmatic mineral, formed in the residual melt of mafic layered intrusions in either the olivine- chromite, pyroxene, or plagioclase-rich layers.