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This is a photo of bars of pure crystalline vanadium.
This is a photo of bars of pure crystalline vanadium. Vanadium is a silverish gray transition metal.Alchemist-hp, Creative Commons License
This is a photo of pieces of pure vanadium, which show vanadium's oxide layer.
This is a photo of pieces of pure vanadium, which show vanadium's characteristic rainbow-colored oxide layer.Jurii, Creative Commons License