Gummite from Hampden County, Massachusetts, USA
USA | |
| "Western Massachusetts Mineral Localities" by Plante, A.R., Valley Geology Press, 1992 |
| Plante, A. (1992): Western Massachusetts Mineral Localities (Valley Geology, Greenfield, Mass) |
USA | |
| "Western Massachusetts Mineral Localities" by Plante, A.R., Valley Geology Press, 1992 |
| Plante, A. (1992): Western Massachusetts Mineral Localities (Valley Geology, Greenfield, Mass) |