Orthoclase from Androscoggin County, Maine, USA
USA | |
| Bastin, E.S. (1911) Geology of the pegmatites and associated rocks of Maine. United States Geological Survey Bulletin Bulletin 445. |
| Rocks and Minerals, (1997) 72:44-48 Wilson, W. E. (1977): Famous mineral localities: The Pulsifer Quarry. Mineralogical Record 8 (2), 72-77 |
| Doug Watts |