The gemstone deposits of Brazil: occurrences, production and economic impact

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Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status. - Document - Gale Academic OneFile

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PDF] The gemstone deposits of Brazil: occurrences, production and economic impact

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PDF) The gemstone deposits of Brazil: Occurrences, production and economic impact

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PDF) The gemstone deposits of Brazil: Occurrences, production and economic impact