Chlorite Group from Delaware County, Pennsylvania, USA
USA | |
| Joe Dunleavy (Pers. Comm.) |
Gordon's Mineralogy of Pennsylvania (1922) p. 191 | |
Gordon, "Mineralogy of Pennsylvania" 1922 p. 193. | |
| Min PA 1922 S. Gordon pg. 199 |
USA | |
| Joe Dunleavy (Pers. Comm.) |
Gordon's Mineralogy of Pennsylvania (1922) p. 191 | |
Gordon, "Mineralogy of Pennsylvania" 1922 p. 193. | |
| Min PA 1922 S. Gordon pg. 199 |