Chalcedony from selected localities.
USA | |
| The Minerals of NYC & Its Environs, NY Min. Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 35. |
[var: Agate] A Quest for New Jersey Minerals (1978), Speiser, R.:14. | |
| [var: Carnelian] Speiser, Robert (1978), A Quest for New Jersey Minerals. (privately published). |
Stirling Brook, Warren Township, Somerset County, New Jersey, USA