Hematite from Forest County, Wisconsin, USA
USA | |
| Lambe, R. N. & R. G. Rowe, (1987), Volcanic history, mineralization, and alteration of the Crandon massive sulfide deposit, Wisconsin: Economic Geology and the Bulletin of the Society of Economic Geologists: 82 (5) :1204-1238 |
Beard, R. (2002), Wisconsin's Quartz Hill Precambrian gems sparkle in the North Woods: Rock & Gem: 32 (5): 20-25. |