|
USA | |
| [var. Smoky Quartz] (1891) The minerals of North Carolina. Bulletin Vol. 74. US Geological Survey doi:10.3133/b74 Genth,F.A.,1891,The Minerals Of North Carolina |
| Jasun McAvoy |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| [Chalcedony var. Agate] Ransom, Jay Ellis (1974) Gems and Minerals of America - A Guide to Rock Collecting. Harper & Row. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |