Argentopyrite from Rocky Mountains, North America
Canada | |
| Hewton, M. L. (2012). Investigation of the Mountain River beryl (emerald variety) occurrence, Mackenzie Mountains, Northwest Territories (MSc dissertation, Science: Department of Earth Sciences). |
USA | |
| Emmons, S. F., Becker, G. F. (1885) Statistics and Technology of the Precious Metals. Bureau of the Census. |
| Ream, Lanny R. (1995) Idaho: Mineral Locality Index. Rocks & Minerals, 70 (4) 242-263 doi:10.1080/00357529.1995.9926628 |