| Locality type: | Lake |
| Classification |
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| Species: | Opal var: Opal-AN |
| Formula: | SiO2 · nH2O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Opal-AN data |
| Locality Data: | Click here to view Lake Tremorgio, Fiesso, Prato (Leventina), Leventina, Ticino, Switzerland |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 550234 |
| Long-form Identifier: | 1:3:550234:9 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Opal-AN |
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| 32.8km (20.4 miles) | ⓘBreccia outcrop, Triebten lake (Trübten lake), Oberaar lake area, Guttannen, Interlaken-Oberhasli, Bern, Switzerland |
| 38.5km (23.9 miles) | ⓘVerampio-Crego area, Premia, Verbano-Cusio-Ossola Province, Piedmont, Italy |
| 38.9km (24.1 miles) | ⓘSementina, Bellinzona, Bellinzona, Ticino, Switzerland |
| 42.5km (26.4 miles) | ⓘGischi glacier (incl. Gischihorn), Binn, Goms, Valais, Switzerland |
| 48.3km (30.0 miles) | ⓘHillehorn northeast slope, Chummibort, Grengiols, Östlich Raron, Valais, Switzerland |
| 51.3km (31.9 miles) | ⓘGrignaschi Quarry, Cosasca, Trontano, Verbano-Cusio-Ossola Province, Piedmont, Italy |
| 60.5km (37.6 miles) | ⓘMadonna d'Ongero, Carona, Lugano, Ticino, Switzerland |
| 64.0km (39.8 miles) | ⓘPuricelli Quarry, Cavagnano, Cuasso al Monte, Varese Province, Lombardy, Italy |
| 64.8km (40.3 miles) | ⓘSeula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy |
| 74.7km (46.4 miles) | ⓘParsettens Alp, Err valley, Tinizong (Tinzen), Surses, Albula Region, Grisons, Switzerland |
| References |
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