Rutile from Worcester County, Massachusetts, USA
USA | |
| Betts, John (n.d.) John Betts website listing. |
| Palache, 1923. The Scapolite Deposit of Bolton Massachusetts (AmMin 8:153-157) |
| Dale, 1910. Supp. Notes on the Commercial Granites of MA (USGS Bull. 470) |
| Hiller, John (1974). Massachusetts Mines and Minerals. (priv. pub.) |
| Hal Herard collection |
| P Cristofono collection |
Raccoon Hill, Barre, Worcester County, Massachusetts, USA