Biotite from selected localities.
USA | |
| Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92 |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
USA | |
| Minerals of Georgia: Their properties and occurrences. Robert Cook GGWRD Bull 92 |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |