Muscovite from selected localities.
USA | |
| [var: Sericite] U.S. Geological Survey Professional Paper 223 |
[var: Sericite] U.S. Geological Survey Professional Paper 223 | |
[var: Sericite] U.S. Geological Survey Professional Paper 223 |
USA | |
| [var: Sericite] U.S. Geological Survey Professional Paper 223 |
[var: Sericite] U.S. Geological Survey Professional Paper 223 | |
[var: Sericite] U.S. Geological Survey Professional Paper 223 |