Sperrylite from Lake County, Minnesota, USA
USA | |
| Chusi Li, Ripley, E.M., Oberthür, T., Miller, Jr., J.D., and Joslin, G.D. (2008): Mineralium Deposita 43, 97-110. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
USA | |
| Chusi Li, Ripley, E.M., Oberthür, T., Miller, Jr., J.D., and Joslin, G.D. (2008): Mineralium Deposita 43, 97-110. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |