Sphalerite from Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
USA | |
| USGS Bull 625 USGS Bull 540 |
(1911) A Manual of the Copper Industry of the World. The Copper Handbook Vol. 10. Horace J. Stevens |