Opal-AN from Appalachian Basin, North America Plate
USA | |
| [var. Hyalite] Barwood, H. (1974) Iron Phosphate Mineral Locality at Indian Mountain, Alabama. The Mineralogical Record: 5(5): p. 242. |
| Cook, Robert B., Smith, W. Everett (1982) Mineralogy of Alabama. Bulletin 120. Geological Survey of Alabama |
| Rocks & Min.: 64:185. |
Betts, John (n.d.) John Betts website listing. | |
| McCallie(1900). Rocks & Min.:64:195 |
| NJ State Geol. Ann. Rpt. (1856): 175. |
| collected by David Bernstein- 10/2009 |
| Rocks & Min.: 20:61. |
| King, Van (n.d.) Personal communcation. |
| Dietrich, R. V. (1990) Minerals of Virginia. Virginia Geological Survey. |
Floyd County, Georgia, USA