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Greece | |
| [var. Opal-CT] Gamaletsos, P.& Roussos-Kotsis, M.(2010): Mordenite-bearing tuffs from Prassa quarry, Kimolos island, Greece. European Journal of Mineralogy. 22, 797-811 Godelitsas, A. |
| [Opal-A var. Opal-AN] |
| Balić-Žunić, T., Garavelli, A., Jakobsson, S. P., Jonasson, K., Katerinopoulos, A., Kyriakopoulos, K., & Acquafredda, P. (2016). Fumarolic minerals: An overview of active European volcanoes. In Updates in Volcanology-From Volcano Modelling To Volcano Geology. InTechOpen. |
| Kilias, Stephanos P., Naden, Jon, Cheliotis, Ioannis, Shepherd, Thomas J., Constandinidou, Heleni, Crossing, John, Simos, Ioannis (2001) Epithermal gold mineralisation in the active Aegean Volcanic Arc: the Profitis Ilias deposit, Milos Island, Greece. Mineralium Deposita, 36 (1) 32-44 doi:10.1007/s001260050284 |