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USA | |
|
| Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87. |
|
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193. |
- Oro Blanco Mining District (Ruby Mining District)
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 193. |
|
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 282
Lewis, W. Scott (1942), Gem collecting in California: Hobbies: 47: 116-117 |
- Bradshaw Mountains (Bradshaw Range)
- Castle Creek Mining District
| Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 87. |
- El Paso Mountains District
| Christopher N. Wentzell |
|
| Christopher Wentzell |
|
| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
- Mormon Mountains District
| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
|
| Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology |
- Central Mining District (Bayard District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey.
Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
Barnett Opal Mine, Silica Gem claims, Last Chance Canyon, El Paso Mountains District, Kern County, California, USA