Microcline from Calumet Township, Houghton County, Michigan, USA
USA | |
| Rocks & Min.:58:109 & 64:150. |
| Rocks & Min.: 21:664. |
| Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109. |
Tim Lemke Personally Collected by Tim Lemke 2013 | |
| Rocks & Min.: 13:137. |
Osceola Mine, Osceola, Calumet Township, Houghton County, Michigan, USA