Botswana Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to South Africa was US$73 during 2018, according to the United Nations COMTRADE database on international trade. Botswana Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to South Africa - data, historical chart and statistics - was last updated on May of 2024.