Chalcocite from Dragoon, Cochise Mining District, Cochise County, Arizona, USA
USA | |
| (1911) A Manual of the Copper Industry of the World. The Copper Handbook Vol. 10. Horace J. Stevens |
Luetcke, Rolf (n.d.) Personal communication. |
USA | |
| (1911) A Manual of the Copper Industry of the World. The Copper Handbook Vol. 10. Horace J. Stevens |
Luetcke, Rolf (n.d.) Personal communication. |
Unnamed W-Cu prospect, Dragoon, Cochise Mining District, Cochise County, Arizona, USA