Opal from selected localities.
USA | |
| No reference listed |
| [Opal-A var: Opal-AN] George, Gilbert (1972). Latest Finds at Rhode Island Road Cuts(Micromounters of New England no. 17, Feb. 1972). |
USA | |
| No reference listed |
| [Opal-A var: Opal-AN] George, Gilbert (1972). Latest Finds at Rhode Island Road Cuts(Micromounters of New England no. 17, Feb. 1972). |