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Uruguay | |
| John S. White (2013) Mineral Mysteries: "Skunks" and Related Phenomena, Rocks & Minerals, 88:4, 368-372. |
| Giulio Morteani, Y. Kostitsyn, C. Preinfalk, H. A. Gilg (2010) The genesis of the amethyst geodes at Artigas (Uruguay) and the paleohydrology of the Guaraní aquifer: structural, geochemical, oxygen, carbon, strontium isotope and fluid inclusion study. International Journal of Earth Sciences 99:927-947 |
| Fabre, Jordi (n.d.) Personal communication. |
| Fabre, Jordi (n.d.) Personal communication. |
| Fabre, Jordi (n.d.) Personal communication. |
| Jordi Fabre specimen |
| Fabre, Jordi (n.d.) Personal communication. |
Artigas, Artigas Department, Uruguay