(n.) 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.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). columbite. Retrieved September 23, 2026, from http://smartdefine.org/columbite/definitions/1989180 |
| Chicago | Webster's. 2011. "columbite" http://smartdefine.org/columbite/definitions/1989180 (accessed September 23, 2026). |
| Harvard | Webster's 2011, columbite, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/columbite/definitions/1989180>. |
| MLA | Webster's. "columbite" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/columbite/definitions/1989180> |