Datolite from selected localities.
USA | |
| Mineralogy of Michigan (2004) Heinrich & Robinson |
| Rosemeyer, T. 2011 New from the Keweenaw: Part 4 - Recent Mineral Finds in Michigan's Copper Country. Rocks & Minerals 86:205-227 | |
| Mineralogy of Michigan (2004) Heinrich & Robinson | |
| Mineralogy of Michigan (2004) Heinrich & Robinson |
| Rocks & Min.: 13:137. |
| Rosemeyer, T. (2007) The Kearsarge: Copper-bearing Amygdaloidal Lode. Houghton and Keweenaw Counties, Michigan. Rocks & Minerals: 82(4): 276-297. | |
| Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 109. |
| Robinson, G.W. (2004) Mineralogy of Michigan by E W Heinrich, updated and revised (2nd edition). A.E. Seaman Mineral Museum, Michigan Technological University, Houghton, Michigan, 252 pages. | |
| Mineralogy of Michigan (2004) Heinrich & Robinson |
| Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111. |
| Rocks & Min.: 21:664. |
| Rosemeyer, T. (2007) The Kearsarge: Copper-bearing Amygdaloidal Lode. Houghton and Keweenaw Counties, Michigan. Rocks & Minerals: 82(4): 276-297. | |
| Rosemeyer, T. (2007) The Kearsarge: Copper-bearing Amygdaloidal Lode. Houghton and Keweenaw Counties, Michigan. Rocks & Minerals: 82(4): 276-297. |
Calumet & Hecla Mine, Calumet, Calumet Township, Houghton County, Michigan, USA