Chalcedony from selected localities.
USA | |
| [var: Agate] various added photos |
[var: Carnelian] Ariel S Wall | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
| [var: Agate] Microprobe, Fall 2007 |
USA | |
| [var: Agate] various added photos |
[var: Carnelian] Ariel S Wall | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
| [var: Agate] Microprobe, Fall 2007 |
Lookout Point Lake, Lane County, Oregon, USA