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USA | |
| Mason, Anita (1976) The World of Rocks and Minerals. Larousse & Co., Inc., New York. |
| MacFall, P.M. (1951) Gem Hunter's Guide (1st ed.). Science and Mathematics Publishing Company, 187 pages. |
| Rick Dalrymple Collection |
| MacFall, P.M. (1951) Gem Hunter's Guide (1st ed.). Science and Mathematics Publishing Company, 187 pages. |
| Phyllis Richardson |
| Gem Trails of Oregon, James R. Mitchell 1998 |
| Gem Trails of Oregon, James R. Mitchell 1998 |
| Steve Ewens Collection |
| people.oregonstate.edu (n.d.) http://people.oregonstate.edu/~wilsolau/agates.html |
| Ariel Duplant |
- Quartzville Mining District
| Steve Ewens Collection |
| [var. Owyhee Jasper] Luetcke, Rolf (n.d.) Personal communication. |
| Blue Mountain Pass, U.S.G.S 7.5 minute map. Pabian agate database. |
| Takehiro Touge |
| J. A. Mandarino & N. V. Witt (1983): Weddellite from Biggs, Oregon, U.S.A. Canadian Mineralogist, 21, 503-508 Rhode, Dale (November 2007): Biggs Picture Jasper: A Legacy is Born. Northwest Newsletter. Northwest Federation of Mineralogical Societies. 47 (4): 11. (PDF) |
Biggs, Sherman County, Oregon, USA