Abstract. Ellinaite, a natural analog of the post-spinel phase ?-CaCr2O4, was discovered at Hatrurim Basin, pyrometamorphic formation (the Mottled Zone), Israel, and in an inclusion within super-deep diamond collected placer Sorriso River, Juína kimberlite field, Brazil. Ellinaite Basin is confined to reduced rankinite–gehlenite paralava, where it occurs as subhedral grains up 30 µm association...