Chrysocolla from Pennington County, South Dakota, USA
USA | |
| Overman, V.K. (1935) Collecting in the Black Hills. Rocks & Minerals, 52:10, 148. |
| Seaman, David (1976) Pegmatite Minerals of the World. In Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Connecticut. |