Botswana Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to Canada was US$362 during 2017, according to the United Nations COMTRADE database on international trade. Botswana Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to Canada - data, historical chart and statistics - was last updated on May of 2024.