Gypsum from selected localities.
USA | |
| The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 68. |
| [var: Selenite] Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p223-224 |
Jensen (1978) Minerals of New York State, 42-43 (Januzzi, 1966, 1989) (Trainer, 1938) (Nightingale 2001) |
Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA