Volborthite from Sonoran Desert, North America
Mexico | |
| Jones, Evan, A., Megaw, Peter K.M. (2021) The Milpillas Mine, Cuitaca, Sonora, Mexico. The Mineralogical Record, 52 (5) 493-626 Fabre, Jordi (n.d.) Personal communication. |
USA | |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 415. |
Milpillas Mine, Milpillas, Santa Cruz Municipality, Sonora, Mexico