Kyanite from Delaware County, Pennsylvania, USA
USA | |
| The Mineralogy of Pennsylvania 1922 Samuel Gordon pg. 185 |
| Rob Lavinsky (ex. Allen Heyl and Richard Kosnar specimen) |
| Gordon, 1922. Mineralogy of Pennsylvania |
Second Geological Survey of Pensylvania: 1874 Preliminary Report of the Mineralogy of Pennsylvania, F. A. Genth "Cyanite"pg.101 | |
Gordon, "Mineralogy of Pennsylvania," 1922 p. 195. | |
| |
| King, Vandall T., 2002, Transparent Micro Staurolite Crystals from Trainer, Pennsylvania, 29th Rochester Mineralogical Symposium Program and Abstracts, p. 13. |
Ridley Township, Delaware County, Pennsylvania, USA