Magnetite from selected localities.
USA | |
| Bernstein, Lawrence R. (1980) Minerals of the Washington, D.C. area. Maryland Geological Survey Educational Series 5, 148 pages. |
Jat Thompson Collection |
USA | |
| Bernstein, Lawrence R. (1980) Minerals of the Washington, D.C. area. Maryland Geological Survey Educational Series 5, 148 pages. |
Jat Thompson Collection |
Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA