Biotite from Big Bug Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
USA | |
| Lindgren, W. (1926), USGS Bull. 782: 143-145. |
| Luetcke, Rolf (n.d.) Personal communication. |
USA | |
| Lindgren, W. (1926), USGS Bull. 782: 143-145. |
| Luetcke, Rolf (n.d.) Personal communication. |
Purple Passion Mine, Morgan Butte, Big Bug Mining District, Bradshaw Mountains, Yavapai County, Arizona, USA