Gummite from selected localities.
USA | |
| Rutley, 12th Ed. (1900) |
| Schooner, Richard. (1947): Collins Hill (Portland, Conn.) Deserted. Rocks & Minerals, vol. 22, no. 2, p. 135. |
USA | |
| Rutley, 12th Ed. (1900) |
| Schooner, Richard. (1947): Collins Hill (Portland, Conn.) Deserted. Rocks & Minerals, vol. 22, no. 2, p. 135. |