Libethenite from Helvetia-Rosemont Mining District, Pima County, Arizona, USA
USA | |
| Luetcke, Rolf (n.d.) Personal communication. |
Luetcke, Rolf (n.d.) Personal communication. | |
| Luetcke, Rolf (n.d.) Personal communication. |
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 277. |
Gunsight Pass, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA