|
USA | |
| Rick Dalrymple Collection |
| Personal Collection - Bill Morgenstern |
| Ron Layton |
| Allan Blaske collection, identified by physical properties (hardness, crystal form, cleavage) |
| Rocks and Minerals Vol. 57:132 |
| Frank Karasti |
| Frank Karasti |
| Machamer, J. F. (1964). Geology and Origin of the Iron Ore Deposits of the Zenith Mine, Ely, Minnesota. PhD Thesis The Pennsylvania State University. |
| Frey, B., & Hanson, A. (2008) Drill Core Evaluation of Vermilion Greenstone Belt Gold Mineralization, Northeastern Minnesota. DNR Open-File Project 373: 2008-2010 |
| Frey, B., & Hanson, A. (2008) Drill Core Evaluation of Vermilion Greenstone Belt Gold Mineralization, Northeastern Minnesota. DNR Open-File Project 373: 2008-2010 |
| George Balogh |
Erie Mining Company Mine, St. Louis County, Minnesota, USA