(n.) A mineral of a steel-gray to black color and metallic luster, occurring crystallized, often in twin crystals shaped like cogwheels (wheel ore), also massive. It is a sulphide of antimony, lead, and copper.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). bournonite. Retrieved September 25, 2026, from http://smartdefine.org/bournonite/definitions/1981896 |
| Chicago | Webster's. 2011. "bournonite" http://smartdefine.org/bournonite/definitions/1981896 (accessed September 25, 2026). |
| Harvard | Webster's 2011, bournonite, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/bournonite/definitions/1981896>. |
| MLA | Webster's. "bournonite" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/bournonite/definitions/1981896> |