Sauconite from selected localities.
USA (FRL) | |
| Arthur Montgomery; The Mineralogy of Pennsylvania, 1922-1965, pg. 52 ; pub#9 Acadamy of Natural Sciences, Philadelphia, PA; Rocks & Minerals (1955) 30:394 |
No reference listed | |
| Rocks & Min.: 6:26; 10:33-36, 58. |
Friedensville Mine, Friedensville, Saucon Valley, Upper Saucon Township, Lehigh County, Pennsylvania, USA