Pyroxene Group from selected localities.
USA | |
| The Minerals of NYC & Its Environs, NY Min. Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 71. |
| The Iron Mines of NJ (1910), Bayley:343; NJ State Geol. Ann. Rpt. (1886):138. |
USA | |
| The Minerals of NYC & Its Environs, NY Min. Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 71. |
| The Iron Mines of NJ (1910), Bayley:343; NJ State Geol. Ann. Rpt. (1886):138. |