| Locality type: | Deposit |
| Classification |
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| Species: | Opal |
| Formula: | SiO2 · nH2O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Opal data |
| Locality Data: | Click here to view Pefka deposit, Alexandroupoli, Evros, Eastern Macedonia and Thrace, Greece |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 2013350 |
| Long-form Identifier: | 1:3:2013350:0 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Opal |
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| 34.1km (21.2 miles) | âPerama Hill deposit, Alexandroupoli, Evros, Eastern Macedonia and Thrace, Greece |
| 36.3km (22.5 miles) | âMavrokoryfi prospect, Maroneia-Sapes, Rhodope, Eastern Macedonia and Thrace, Greece |
| 67.2km (41.8 miles) | âAda Tepe Au deposit, Krumovgrad Municipality, Kardzhali Province, Bulgaria |
| 76.4km (47.5 miles) | âZvezdel, Momchilgrad Municipality, Kardzhali Province, Bulgaria |
| 77.2km (48.0 miles) | âDachiardite-K occurrence, Zvezdel, Momchilgrad Municipality, Kardzhali Province, Bulgaria |
| 81.3km (50.5 miles) | âMadzharovo deposit, Madzharovo, Madzharovo Municipality, Haskovo Province, Bulgaria |
| 83.6km (52.0 miles) | âPotochnitsa, Krumovgrad Municipality, Kardzhali Province, Bulgaria |
| 89.3km (55.5 miles) | âAdatepe prospect, Lapseki District, Ãanakkale Province, Turkey |
| 91.3km (56.7 miles) | âKestanelik deposit, Lapseki District, Ãanakkale Province, Turkey |
| References |
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Melfou, Margarita; Voudouris, Panagiotis; Cauzid, Jean; Jatteau, MarjolÃĻne; Klemd, Reiner; Sakellaris, Grigorios A.; Papadopoulou, Lambrini; Tarantola, Alexandre; Kantiranis, Nikolaos (2026) Hydrothermal Alteration Architecture of the Pefka-Loutros High- to Intermediate-Sulfidation Epithermal Area, NE Greece: Constraints from Integrated pVNIR-SWIR Spectroscopy and XRD. Minerals, 16 (9). doi:10.3390/min16090965 |
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