Opal-AN from
USA | |
| Miller, 1971. RI Minerals & Their Locations |
| George, Gilbert (1972). Latest Finds at Rhode Island Road Cuts(Micromounters of New England no. 17, Feb. 1972). |
USA | |
| Miller, 1971. RI Minerals & Their Locations |
| George, Gilbert (1972). Latest Finds at Rhode Island Road Cuts(Micromounters of New England no. 17, Feb. 1972). |