Opal from selected localities.
Greece | |
| [Opal-A var: Opal-AN] Ritter, K.-H. (1978): Hyalit und Langit von Lavrion. Lapis, 3(10), 11. |
| Branko Rieck collection |
Greece | |
| [Opal-A var: Opal-AN] Ritter, K.-H. (1978): Hyalit und Langit von Lavrion. Lapis, 3(10), 11. |
| Branko Rieck collection |
Paliokamariza Mine No. 18, Paliokamariza Mines, Plaka, Lavrion Mining District, Lavreotiki, East Attica, Attica, Greece