Jacobsite from Michigan, USA
USA | |
| Shawn Carlson (2010) Mineral News, 26, #11, 1-2 & 9-10. |
www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf. | |
| Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111. & 61:328. |