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Coulsonite: Fe++V+++2O4
Comments: Evenly disseminated fine-grained coulsonite in subhedral crystals (light gray) scattered through silicate gangue (dark gray), composed of chlorite, muscovite and scapolite. (AmMin, v47:1284). Location: Metamorphosed igneous rocks of the Buena Vista Hills located some twenty miles southeast of the town of Lovelock, Nevada, USA. Scale: Picture Size 135 x. © American Mineralogist