JohnwalkiteChampion Mine, Keystone, Keystone District, Pennington Co., South Dakota, USA
Photo: 2008, JGW Located 5 miles southeast of Keystone.
References
- Dunn, P. J.; Peacor, D. R.; Sturman, D. B.; Ramik, R. A.; Roberts, W. L.; Nelen, J. A. (1986): Johnwalkite, the manganese analog of olmsteadite, from South Dakota. Neues Jahrbuch für Mineralogie, Monatshefte 1986, 115-120.
Mineral List
13 entries listed. 12 valid minerals. 1 type locality (valid mineral).
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