Opal from selected localities.
USA | |
| [Opal-A var: Opal-AN] Harold Moritz collection |
[Opal-A var: Opal-AN] King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed.), 2000, Mineralogy of Maine, V. 2, with updates by Van King | |
Cameron, Eugene N.; and others (1954) Pegmatite investigations, 1942-45, in New England. USGS Professional Paper 255. | |
| [Opal-A var: Opal-AN] No reference listed |