Quartz from selected localities.
USA | |
| [var: Amethyst] Sweeney, Ryan (2018), personal communication with Mindat.org. |
| [var: Smoky Quartz] William C. van Laer, The Lapidary Journal May 1985 |
[var: Smoky Quartz] Wm. C. van Laer. | |
| 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. |
Beehive #1 pegmatite, Goldflint Mountain, Boulder Batholith, Jefferson County, Montana, USA