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USA | |
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| [Agate var. Lake Superior Agate] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Jolliffe, F. (1935) A study of greenalite. American Mineralogist: 20: 405-425. |
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| 55TH INSTITUTE ON LAKE SUPERIOR GEOLOGY (2009) PROCEEDINGS VOLUME 55 p. 23-24
(2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| [Agate var. Lake Superior Agate] Brian Cowger |
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| Edith Trybalski |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Allan Blaske collection, identified by physical properties (hardness, crystal form, cleavage) |
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| Rocks & Minerals 81:136-140 |
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| R. Peter Richards Collection |
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| Beste, Bob (2005) Location Guide for Rockhounds in the United States (3rd ed.) |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| 55TH INSTITUTE ON LAKE SUPERIOR GEOLOGY (2009) PROCEEDINGS VOLUME 55 p. 54-55 |
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| Frank Karasti |
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| Rocks & Min.: 18:302-303
57:93-95. |
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| Eby, J. H. and Berkey, C. P. (1897) The Occurrence of Copper Minerals in Hematite Ore, Montana Mine, Soudan Minnesota. Year Book of the Society of Engineers, University of Minnesota 108-117 |
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| Machamer, J. F. (1964). Geology and Origin of the Iron Ore Deposits of the Zenith Mine, Ely, Minnesota. PhD Thesis The Pennsylvania State University. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Frey, B., & Hanson, A. (2008) Drill Core Evaluation of Vermilion Greenstone Belt Gold Mineralization, Northeastern Minnesota. DNR Open-File Project 373: 2008-2010 |
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| 55TH INSTITUTE ON LAKE SUPERIOR GEOLOGY (2009) PROCEEDINGS VOLUME 55 p. 52-53
Frey, B., & Hanson, A. (2008) Drill Core Evaluation of Vermilion Greenstone Belt Gold Mineralization, Northeastern Minnesota. DNR Open-File Project 373: 2008-2010 |
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| Frey, B., & Hanson, A. (2008) Drill Core Evaluation of Vermilion Greenstone Belt Gold Mineralization, Northeastern Minnesota. DNR Open-File Project 373: 2008-2010 |
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| Frank Karasti |
Soudan Mine, Soudan, Vermilion Range, St. Louis County, Minnesota, USA