Columbite (Niobite) - Jacu claim - Equador - Rio Grande do Norte - Brazil - Main ore of niobium and used widely in industry

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Columbite (Niobite) - Jacu claim - Equador - Borborema - Rio Grande do Norte - Brazil - Main ore of niobium and used widely in industry - Also a source of tantalum

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Photo credit: © John Cancalosi / Alamy / Afripics
License: Licensed
Model Released: No

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