Sphalerite from selected localities.
USA | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
Pogue, J. E. Jr. (1910) The Cid Mining District of Davidson County, North Carolina: North Carolina Geological and Economic Survey (NCGS) Bulletin No.22, 144p. | |
U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia |