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USA | |
- Conner Creek Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| MacFall, P.M. (1951) Gem Hunter's Guide (1st ed.). Science and Mathematics Publishing Company, 187 pages. |
|
| Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc., Phoenix, Arizona. 567pp. |
|
| Micro Probe Volume VI Number 4 |
- Clackamas River localities
| Bill Thompkins |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc., Phoenix, Arizona. 567pp.
Micro Probe Vol. 6 No. 5 Fall 1987 |
- Howard Mining District (Ochoco Mining District; Bolivar Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| |
- Newberry National Volcanic Monument
| Mineralogy of 10 Geothermal boreholes drilled in and around the Newberry Caldera U.S. Geological Survey Professional Paper, Issue 1578 By Keith E. Bargar, Terry E. C. Keith 1999 |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Pueblo Mining District (Denio Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| Marshall W. Gannett and Keith E. Bargar
1981 Volcanic stratigraphy and secondary mineralization of USGS Pucci geothermal test well, Mount Hood, Oregon, Open-File Report 81-1330. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Butte Creek Mining District
| Oregon Metal Mines Handbook, 1943, Oregon Department of Geology and Mineral Industries: Bulletin No. 14-C, Vol. 2, Section 2 - Jackson Co., page 141. |
- Evans Creek Mining District
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| [Opal-A var. Opal-AN] K. Volkman personal collection |
|
| Occurs inside the Thunder Eggs |
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| Aidan Cerenzie Collection |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| [Opal-A var. Opal-AN] Kleck. W. D. (1970): Cavity Minerals At Summit Rock. American Mineralogist. 55, 1396-1404 |
|
| MRDS file #10225715. |
|
| BROOKS, H. C. (1963) QUICKSILVER IN OREGON: OREGON DEPT. OF GEOLOGY AND MINERAL INDUSTRIES, BULLETIN 55
174. |
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| BROOKS, H. C. (1963) QUICKSILVER IN OREGON: OREGON DEPT. OF GEOLOGY AND MINERAL INDUSTRIES, BULLETIN 55
173. |
|
| Dake, H. C. (1956) Northwest Gem Trails - A Field Guide for the Gem Hunter, Mineral Collector and Tourist (2nd ed.) Gembooks. |
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| Steve Ewens Collection |
|
| Extra Lapis - English No. 10 Opal |
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| R. E. Cohenour (1960) Geology and Uranium Occurrences Near Lakeview, Oregon; United States Atomic Energy Commission, RME-2070; 17-22. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| [Opal-A var. Opal-AN] O'Neal, C. (2013), Field collection and visual analysis of the Oregon Sunstone deposits near Plush, Lake County, Oregon
March. |
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| [Opal-A var. Opal-AN] O'Neal, C. (2013), Field collection and visual analysis of the Oregon Sunstone deposits near Plush, Lake County, Oregon
March. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
- Black Butte Mining District
| From the labelled Byron Weissberg PhD collection. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
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| |
- Opalite Mining District (McDermitt Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey.
Nevada Bureau of Mines and Geology NBMG Open-File Report 96-3 By Stephen B. Castor, Christopher D. Henry, Lisa A. Shevenell |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
|
| Dake, H. C. (1956) Northwest Gem Trails - A Field Guide for the Gem Hunter, Mineral Collector and Tourist (2nd ed.) Gembooks. |
- Santiam Mining District (Elkhorn Mining District)
- Breitenbush-Austin Hot Springs area
| (2005) Mineral Resources Data System (MRDS), US Geological Survey.
Bargar, K.E., Oscarson, R.L. (1997) Zeolites and selected other hydrothermal minerals in the Cascade Mountains of northern Oregon. Open-File Report Vol. 1997 (97-100) US Geological Survey doi:10.3133/ofr97100 |
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| [Opal-A var. Opal-AN] USGS |
Opal Butte, Morrow County, Oregon, USA