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USA | |
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| https://www.mindat.org/photo-1350451.html |
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| Gems & Minerals 395:28-29 (1970). |
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| https://www.mindat.org/photo-1352113.html |
- Cave-In-Rock Mining Sub-District
| Goldstein, Alan (1997) Famous Mineral Localities: The Illinois-Kentucky Fluorite District. The Mineralogical Record, 28 (1) 3-49 |
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| Mineralogical Record (1997) 28:3-49 |
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| Mineralogical Record (1997) 28:3-49 |
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| Stuart Weller, Charles Butts, Louis W. Currier, Rollin D. Salisbury (1920) The geology of Hardin County, and the adjoining part of Pope County Illinois Geological Survey Bull. 41 |
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| Stuart Weller, Charles Butts, Louis W. Currier, Rollin D. Salisbury (1920) The geology of Hardin County, and the adjoining part of Pope County Illinois Geological Survey Bull. 41 |
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| Mineralogical Record (1997) 28:3-49 |
- Stewart Mining Sub-District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Mineralogical Record (1997) 28:3-49 |
- Empire Mining Sub-District
| Mineralogical Record (1997) 28:3-49 |
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| Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
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| Erd, Richard C., Greenberg, Seymour S. (1960) Minerals of Indiana. Bulletin 18. Indiana Geological Survey |
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| Zeitner (1956), Midwest Gem Trails |
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| Buchwald, Vagn F. (1975) Handbook of Iron Meteorites - Their History, Distribution, Composition and Structure. University of California Press. |
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| Buchwald, Vagn F. (1975) Handbook of Iron Meteorites - Their History, Distribution, Composition and Structure. University of California Press. |
- Illinois - Kentucky Fluorspar Mining District
| Fohs, F. J. (1907) Fluorospar Deposits of Kentucky. Kentucky Geological Survey Bull. 9 |
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| Tassin, W. (1905) The Mount Vernon meteorite. Proc. U. S. Natl.Mus.,vol.28,pp. 213-217. |
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| Hardin, George C., Jr. (1955) Fluorspar deposits in western Kentucky, part 1: Babb fault system, Crittenden and Livingston Counties. USGS Bulletin 1012B |
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| Fohs, F. J. (1907) Fluorospar Deposits of Kentucky. Kentucky Geological Survey Bull. 9 |
- Illinois - Kentucky Fluorspar Mining District
| Mineralogical Record (1997) 28:3-49 |
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| Buchwald, Vagn F. (1975) Handbook of Iron Meteorites - Their History, Distribution, Composition and Structure. University of California Press. |
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| Goldstein, Alan (2006) Kentucky Mineral: Locality Index. Rocks & Minerals, 81 (6) 420-440 doi:10.3200/rmin.81.6.420-440 |
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| Crane, G.W. (1912) The Iron Ores Of Missouri: Missouri Bureau Of Mines And Geology, Second Series, Volume 10: 288. |
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| Conroy, Kevin (2023) Personal Communication. |
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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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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
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| Burchard,Ernest F.,(1927) The Brown Iron Ores Of West- Middle Tennessee : USGS Bulletion 795-D |
Jacob's Geode Mine, Hamilton, Hancock County, Illinois, USA