Rock Crystal from Pedregosa Basin, North America Plate
USA | |
| Luetcke, Rolf (n.d.) Personal communication. |
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 362. Romslo, T.M. (1949), Investigation of Keystone and St. George copper-zinc deposits, Cocbhise Co., AZ, US Bur. Mines Rept. Inv. 4504 |
Burro Pit, Johnson Mine, Johnson Camp, Gunnison Copper Project, Cochise Mining District, Cochise County, Arizona, USA