Magnetite from East Tintic Mountains, Utah, USA
USA | |
| Collected by John Dagenais, in the collection of Alex Earl |
Singer, Donald A., Berger, Vladimir Iosifovich, Moring, Barry C. (2005) Porphyry copper deposits of the world: database, map, and grade and tonnage models. Open-File Report 2005-1060. US Geological Survey doi:10.3133/ofr20051060 | |
| Collected by and in the collection of Alex Earl |
Shaft No. 1, Colorado Mine, East Tintic Mining District, Utah County, Utah, USA