Quartz from selected localities.
USA | |
| U.S. Geological Survey,2005, Mineral Resources Data System: U.S Geological Survey,Reston, Virginia |
| USGS Prof Paper 610 "Principal Gold Producing Districts of the United States", Steve Adams |
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 | |
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. |