Tourmaline from Delaware County, Pennsylvania, USA
USA | |
| www.libraries.psu.edu/emsl/guides/X/delaware.htm. |
| P. Hewett collection |
| Rocks & Min.: 59:109-120 & 62:176-178. |
| Rocks & Min.: 59:109-120 & 62:176-178. |
| Rocks & Min.: 59:109-120 & 62:176-178. |
| King, Vandall T., 2002, Transparent Micro Staurolite Crystals from Trainer, Pennsylvania, 29th Rochester Mineralogical Symposium Program and Abstracts, p. 13. |
Morton Homestead, Prospect Park, Ridley Township, Delaware County, Pennsylvania, USA