Magnetite from selected localities.
USA | |
| David Busha collection |
| Emerson, B. K. (1902), Note on Corundum and a Graphitic Essonite, from Barkhamsted, Connecticut. American Journal of Science: s. 4, 14: 234-6. |
John Burnham |
USA | |
| David Busha collection |
| Emerson, B. K. (1902), Note on Corundum and a Graphitic Essonite, from Barkhamsted, Connecticut. American Journal of Science: s. 4, 14: 234-6. |
John Burnham |