Quartz from selected localities.
USA | |
| H.Ries.,W.S. Bayley,and others (1922) High -Grade Clays Of The Eastern United States ; USGS Bulletion 708 |
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" | |
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. |