Noun
A mineral of a black color, submetallic luster, and high specific specific gravity. It is a niobate (or columbate) of iron and manganese, containing tantalate of iron; -- first found in New England.
Source: Webster's dictionaryKaduna State is also blessed with an array of mineral resources which include, Kyanite, Kaolin, Columbite, Gold, Quartz, Mica, Clay, Asbestos, and Graphite. Source: Internet