Opal from selected localities.
USA | |
| Mins. of NYC & Its Environs, NY Min. Club (1931), Manchester, J.G.; Rocks & Min.: 59-157-183 (1984), Peters, Joseph J. |
| [Opal-A var: Opal-AN] The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 96. |
| Mins. of NYC & Environs, NY Min. Club (1931), Manchester. |
| [Opal-A var: Opal-AN] American Muiseum of Nat. History, NY, specimen(s); Paterson, NJ, Museum specimens; Rocks & Min.: 59:157-183, Peters, Joseph J. (1984). |