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USA | |
| Similar samples from identical geology found to be sepiolite via EDS analysis. |
| Januzzi, Ronald. E. (1994) Mineral Data Book - Western Connecticut and Environs. Mineralogical Press, Danbury, Connecticut, USA. Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA. |
| John H. Betts (2009) "The minerals of New York City", Rocks & Minerals, 84, 204-240. |
| New York State Museum collection |
Agstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA