Limonite from St. Louis County, Minnesota, USA
USA | |
| R&M 31:2-3 p 134 |
| Frey, B., & Hanson, A. (2008) Drill Core Evaluation of Vermilion Greenstone Belt Gold Mineralization, Northeastern Minnesota. DNR Open-File Project 373: 2008-2010 |
| Frank Karasti |
Gruner prospect, Virginia, St. Louis County, Minnesota, USA