(n.) A hydrous phosphate of iron of a blue to green color, growing darker on exposure. It occurs in monoclinic crystals, also fibrous, massive, and earthy.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). vivianite. Retrieved September 24, 2026, from http://smartdefine.org/vivianite/definitions/2080048 |
| Chicago | Webster's. 2011. "vivianite" http://smartdefine.org/vivianite/definitions/2080048 (accessed September 24, 2026). |
| Harvard | Webster's 2011, vivianite, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/vivianite/definitions/2080048>. |
| MLA | Webster's. "vivianite" 28 May 2011. Web. 24 September 2026. <http://smartdefine.org/vivianite/definitions/2080048> |