Quartz 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. | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Summerlin, E. (2014). PGE mineralization at the Allard stock: Implications for the porphyry to epithermal transition, La Plata Mountains, Colorado (Auburn University MS thesis). |