The World's Largest Producers of Niobium - WorldAtlas
Sep 25, 2017· However, Nigeria has been proven to have reserves of 14,000 tons of niobium. The areas where niobium mines are located in Nigeria are Jos Plateau, Kano, and Bauchi states. Nigeria is the second highest African producer of niobium after Rwanda. The mining industry in Nigeria contributes 0.3% of its Gross Domestic Product (GDP).