Epsomite from Philadelphia County, Pennsylvania, USA
USA | |
| Gordon, 1922. Mineralogy of Pennsylvania |
Ref.: Gordon, S.G. (1922) "The Mineralogy of Pennsylvania," Special Publication No. 1, The Academy of Natural Sciences of Philadelphia: p. 125. |
USA | |
| Gordon, 1922. Mineralogy of Pennsylvania |
Ref.: Gordon, S.G. (1922) "The Mineralogy of Pennsylvania," Special Publication No. 1, The Academy of Natural Sciences of Philadelphia: p. 125. |