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USA | |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Awakening Mining District
| Jackson, R. G., & Chevillon, C. V. (2007) 3D Geochemical and Mineralogical Model of the Sleeper Low Sulphidation Gold System, Nevada. Poster presentation - Exploration 07. Toronto
WARREN, I. (2005) Geology, geochemistry, and genesis of the El PeΛnΓ³n epithermal Au-Ag deposit, northern Chile: Characteristics of a bonanza-grade deposit and techniques for exploration. Unpublished Ph.D. thesis, New Zealand, University of Auckland, Auckland, New Zealand, 428 pp.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Econ Geol (1994) 89:628-638
USGS Bull 2090 |
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| [var. Precious Opal] Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
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| [var. Precious Opal] Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
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| [var. Precious Opal] Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
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| [var. Opaline] Henry, C.D. (2020) Lithium-Rich Claystone in the McDermitt Caldera, Nevada, USA: Geologic, Mineralogical, and Geochemical Characteristics and Possible Origin. Minerals 10, 68.
Castor, S.B. |
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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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| Econ Geol (1985) 80:360-393 |
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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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| NBMG Bull 59 Geology and Mineral Resources of Humboldt County, Nevada |
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| Williams, Sidney A. (1979) Curetonite, a new phosphate from Nevada, in July - August 1979. The Mineralogical Record, 10 (4) 219-221 |
- Rabbit Hole Mining District
| Adams, George I. The Rabbit Hole Sulphur Mines Near Humboldt House, Nev. In: Contributions to Economic Geology 1903 United States Geological Survey Bulletin 225 Government Printing Office, Washington DC 1904 |
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| Adams, George I. The Rabbit Hole Sulphur Mines Near Humboldt House, Nev. In: Contributions to Economic Geology 1903 United States Geological Survey Bulletin 225 Government Printing Office, Washington DC 1904 |
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| [var. Precious Opal] Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| Econ Geol (1997) 92:578-600 |
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| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
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| [Precious Opal var. Black Opal] Betts, John (n.d.) John Betts website listing. |
- Virgin Valley Mining District
| (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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| USGS Bull 1538D |
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| [var. Precious Opal] Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology
USGS Bull 1538D |
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| [var. Precious Opal] Christopher Wentzell |
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| [var. Precious Opal] Eckert, Allen W. (1997) The World of Opals. (John Wiley & Sons, New York). p. 312,310. |
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| [var. Precious Opal] Rocks & Min.:13:56.
USGS Bull 1538D |
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| [var. Precious Opal] Christopher Wentzell collection. |
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| [var. Precious Opal] (2005) Mineral Resources Data System (MRDS), US Geological Survey.
USGS Bull 1538D |
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| [var. Precious Opal] Christopher Wentzell |
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| [var. Precious Opal] Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
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| [var. Jelly Opal] Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology
Extra Lapis - English No. 10 Opal |
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| [var. Precious Opal] USGS Bull 1538D |
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| [var. Precious Opal] Rocks & Min.: 8:16
19:13.
USGS Bull 1538D |
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| [var. Precious Opal] Keith Hodson, (1994) personal communication to Christopher Wentzell |
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| (2005) Mineral Resources Data System (MRDS), US Geological Survey.
USGS Bull 1538D |
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| [var. Precious Opal] Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
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| [var. Precious Opal] Christopher Wentzell |
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| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
- WRT Stonetree group ("Dominion Opal Mine")
| Christopher Wentzell collection. |
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| Sinkankas, John (1959) Gemstones of North America Vol. 1. Van Nostrand Reinhold Co., New York. |
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| Christopher Wentzell, dug 2013 October
known since 1994,C. Wentzell collection |
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| [var. Precious Opal] Christopher N. Wentzell |
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| [var. Precious Opal] various contributors (2013) Nevada-Jackpot! Mineral Monograph 18, Lithographie LLC, 59 |
Virgin Valley, Humboldt County, Nevada, USA