Sphalerite from selected localities.
USA | |
| Sloto, R.A. (1989). Famous mineral localities: The Phoenixville, Lead silver mines, Chester County, Pennsylvania. The Mineralogical Record, 20(5), 369-386. |
| Rocks & Min.:9:21. |
| Sloto, R.A. (1989). Famous mineral localities: The Phoenixville, Lead silver mines, Chester County, Pennsylvania. The Mineralogical Record, 20(5), 369-386. | |
| The Mineralogy of Pennsylvania; Samuel Gordon, Pg. 175 |
| Sloto, R.A. (1989). Famous mineral localities: The Phoenixville, Lead silver mines, Chester County, Pennsylvania. The Mineralogical Record, 20(5), 369-386. | |
| Smith, J.L. (1855) Reexamination of American minerals: Part V — The minerals of the Wheatley mine in Pennsylvania. American Journal of Science and Arts, 20, 2nd ser., 242-253.; Sloto, R.A. (1989). Famous mineral localities: The Phoenixville, Lead silver mines, Chester County, Pennsylvania. The Mineralogical Record, 20(5), 369-386. | |
| Sloto, R.A. (1989). Famous mineral localities: The Phoenixville, Lead silver mines, Chester County, Pennsylvania. The Mineralogical Record, 20(5), 369-386.; Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1287 pgs (1069). |
| Boucot, Arthur James (1949) Notes on the Ecton Mine, Montgomery County, Pennsylvania. Rocks & Minerals, 24(9-10), 492-495.; Rocks & Min.: 21:17, 140. | |
| Smith, R.C., II (1977). Zinc and lead occurrences in Pennsylvania. Pennsylvania Geological Survey, Mineral Resource Report 72, 318 pgs. | |
| Smith, R.C., II (1977). Zinc and lead occurrences in Pennsylvania. Pennsylvania Geological Survey, Mineral Resource Report 72, 318 pgs. |
Wheatley Mines, Schuylkill Township, Chester County, Pennsylvania, USA