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Tantalite-(Fe): Fe++Ta2O6
Comments: Blocky, crystalline aggregate of ferrotantalite crystals weighing over one kilogram. Location: Ecuador, Minas Gerais, Brazil. Scale: 10 x 6 x 5 cm. © Rob Lavinsky
Comments: Rounded black crystal of ferrotantalite. Location: Mount Surprise, Queensland, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species