Columbite
Pronunciation : Co*lum"bite
Part of Speech : n.
Etymology : [Cf. F. colombite. See Columbium.] (Min.)
Definition : Defn: 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 Unabridged Dictionary, 1913