Limonite from
USA | |
| Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt , North Carolina : NCGS Bulletion 84 |
| Wilson, W.F., McKenzie, B.J. (1978) Mineral Collecting Sites in North Carolina. Information Circular 24. North Carolina Division of Mineral Resources |
Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84 | |
| Rocks & Min.: 60: 166. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Dietrich, R. V. (1990) Minerals of Virginia. Virginia Geological Survey. |