Mineral Resources in Nigeria amp their Location
May 30, 2018 10. GEMSTONES. Gemstones are one of the important mineral resources in Nigeria found and exploited heavily in Plateau, Kaduna and Bauchi. sapphire, ruby, aquamarine, emerald, tourmaline, topaz, garnet, amethyst zircon, are some of the Gemstones in these areas and are regarded as part of the best in the world.