Opal from Ireland (island)
UK | |
| [Opal-A var. Opal-AN] Trevor Boyd Collection |
| Greg, Robert Philips, Lettsom, William G. (1858) Manual of the Mineralogy of Great Britain and Ireland. John Van Voorst, London. |
UK | |
| [Opal-A var. Opal-AN] Trevor Boyd Collection |
| Greg, Robert Philips, Lettsom, William G. (1858) Manual of the Mineralogy of Great Britain and Ireland. John Van Voorst, London. |