Freibergite Subgroup from Idaho, USA
USA | |
| Rocks & Min.:9:170. |
| (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. |
| Allen, K. D. (1990). Geology and Mineralization of the Grouse Creek Au-Ag Deposit Custer County, Idaho. MS Thesis Boise State University |
| Rolland R. Reid (1961) Guidebook to the Geology of the Coeur d'Alene Mining District. Bulletin 16. Idaho Bureau of Mines and Geology |
| Maurice de Graaf specimen |
Kellogg, Shoshone County, Idaho, USA