Zambia Exports of niobium, tantalum, vanadium or zirconium ores and concentrates to South Africa was US$638 during 2005, according to the United Nations COMTRADE database on international trade. Zambia 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.