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USA | |
| www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf. |
| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
- Ishpeming Greenstone belt (Marquette Greenstone belt)
| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| "Mines and Minerals of Michigan's Iron Country," Ramon S. Demark. Rocks & Minerals, March 2000. |
| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| Dan Fountain collection |
| Rebecca A. Simmons (2009) "Minerals of the Grizzly Pegmatite, Marquette County, Michigan", Mineral News, 25, #4, 1 & 12-13. |
| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
Black River pegmatite, Republic, Marquette County, Michigan, USA