Byssolite from Chester County, Pennsylvania, USA
USA | |
| The Mineralogy of Pennstlvania 1922-1965 A. Montgomery, pg. 45 |
| Mineralogical Record, 25(2),pp:105-120. |
Dana 6:471,1068. | |
Dana 6: 446, 1068. | |
| S.Herring collection |
Mineralogy of Pennsylvania-1922 Samuel S. Gordon, pg. 178 |
French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA