Soapstone from Worcester County, Massachusetts, USA
USA | |
| Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc. |
| Hitchcock, Edward (1841): Final Report on the Geology of Massachusetts, Vol. 1., p. 157. |
USA | |
| Gleba, Peter P. (2008) Massachusetts Mineral and Fossil Localities. Kreueger Enterprises, Inc. |
| Hitchcock, Edward (1841): Final Report on the Geology of Massachusetts, Vol. 1., p. 157. |