Covellite from Hartford Mining District, Cochise County, Arizona, USA
USA | |
| Luetcke, Rolf (n.d.) Personal communication. |
Luetcke, Rolf (n.d.) Personal communication. | |
| "The Accidental Pocket" talk presented by Robert E. Walstrom at 2012 NCMA meeting. |
| Luetcke, Rolf (n.d.) Personal communication. |
Reef Mine, Carr Canyon, Cochise County, Arizona, USA