Graphite from Rockland County, New York, USA
USA | |
| Rocks & Min.:7:81. Rocks & Minerals 82:472-483 |
| Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1) New York Mineralogical Club |
| John Weitmann specimen, Howard Heitner collection |
Beechy Bottom Mine, Bear Mountain State Park, Rockland County, New York, USA