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USA | |
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| [Chalcedony var. Agate] The Mineralogist, v. 24, no. 5 |
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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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| (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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| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
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| Tom Buchholz found location and tested minerals |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| From geologist Laurence Nuelle, Rollo, MO |
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| Leach, D. L., 1980, Nature of Mineralizing Fluids in the Barite Deposits of Central and Southeast Missouri, Economic Geology, 75:1168-1180. |
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| [Chalcedony] (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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| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
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| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| www.missourigeologists.org (2017) http://www.missourigeologists.org/Meeting2009/AMGguidebook2009.pdf |
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| [Chalcedony] (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Leach, D. L., 1980, Nature of Mineralizing Fluids in the Barite Deposits of Central and Southeast Missouri, Economic Geology, 75:1168-1180. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
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| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
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| Winslow, Arthur (1894) Lead and Zinc Deposits (Section 2). Missouri Geological Survey, Volume VII: 682. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046
C. W. Whitten and R. J. Yancey (1991) Characterization of the Rare-earth Mineralogy at the Pea Ridge Deposit, Missouri. USBM Report of Investigations 9331. |
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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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| Betts, John (n.d.) John Betts website listing. |
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| Winslow, Arthur (1894) Lead and Zinc Deposits (Section 2). Missouri Geological Survey, Volume VII: 678-679. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| [Chalcedony var. Agate] MacFall, P.M. (1951) Gem Hunter's Guide (1st ed.). Science and Mathematics Publishing Company, 187 pages. |
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| Sherwood, Mark D., Williams, Glenn A. (1998) Missouri Mineral Locality Index. Rocks & Minerals, 73 (2) 98-117 doi:10.1080/00357529809603046 |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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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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| Conroy, Kevin (2023) Personal Communication. |
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| [Chalcedony] Econ Geol (1987) 82:719-734
Brobst, D. A. (1958) Barite resources of the United States. Bulletin Vol. 1072B. US Geological Survey doi:10.3133/b1072b |
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| [Chalcedony] (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Conroy, Kevin (2023) Personal Communication. |
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| Schoolcraft, H.R., 1819, A view of the lead mines of Missouri, including some observations on the mineralogy, geology, geography, antiquities, soil, climate, population, and productions of Missouri and Arkansas, and other sections of the western country: 116. |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Blackwell Mine, Tiff, Washington County, Missouri, USA