Chalcedony 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. | |
U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. Cain, P., & Eng, P. (2007). Technical Report on the Feasibility Study for the Hollister Development Block Gold Project, Elko County, Nevada. Project No: 2007CM16 National Instrument 43-101 |