Gyrolite from Virginia, USA
USA | |
| ID by Tony Kampf |
| Dietrich, R. V. (1990) Minerals of Virginia. Virginia Geological Survey. |
| Penick, D. (1985) Virginia Mineral Locality Index. Rocks & Minerals: 60(4): 164-170 (167). |
| Dietrich, R. V. (1990) Minerals of Virginia. Virginia Geological Survey. |