Chalcotrichite from Midcontinent Rift, USA
USA | |
| Rosemeyer, T. (2007) The Kearsarge: Copper-bearing Amygdaloidal Lode. Houghton and Keweenaw Counties, Michigan. Rocks & Minerals: 82(4): 276-297. |
| Frank Karasti |
| Frank Karasti |
USA | |
| Rosemeyer, T. (2007) The Kearsarge: Copper-bearing Amygdaloidal Lode. Houghton and Keweenaw Counties, Michigan. Rocks & Minerals: 82(4): 276-297. |
| Frank Karasti |
| Frank Karasti |
Minesota Mine, Rockland, Ontonagon County, Michigan, USA