| Locality type: | Volcanic Cone |
| Classification |
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| Species: | Opal |
| Formula: | SiO2 · nH2O |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Data |
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| Mineral Data: | Click here to view Opal data |
| Locality Data: | Click here to view Mont Croustet, Ceyssac, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1005550 |
| Long-form Identifier: | 1:3:1005550:4 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Opal |
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| 20.0km (12.4 miles) | ⓘLa Sauvetat, Landos, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France |
| 41.1km (25.5 miles) | ⓘMoulergues, Chastel, Brioude, Haute-Loire, Auvergne-Rhône-Alpes, France |
| 50.6km (31.4 miles) | ⓘClavières d'Outre, Val-d'Arcomie, Saint-Flour, Cantal, Auvergne-Rhône-Alpes, France |
| 52.8km (32.8 miles) | ⓘLa Violette farm, Saint-Beauzire, Brioude, Haute-Loire, Auvergne-Rhône-Alpes, France |
| 57.2km (35.6 miles) | ⓘFaverolles quarry, Val-d'Arcomie, Saint-Flour, Cantal, Auvergne-Rhône-Alpes, France |
| 61.3km (38.1 miles) | ⓘCol de l'Escrinet, Saint-Priest, Privas, Ardèche, Auvergne-Rhône-Alpes, France |
| 64.8km (40.3 miles) | ⓘLe Crêt, Saint-Priest-en-Jarez, Saint-Étienne, Loire, Auvergne-Rhône-Alpes, France |
| 67.7km (42.1 miles) | ⓘMont Semiol, Châtelneuf, Montbrison, Loire, Auvergne-Rhône-Alpes, France |
| 77.3km (48.1 miles) | ⓘPrudeux, Saint-Babel, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France |
| 77.9km (48.4 miles) | ⓘRoca-Neyra, Perrier, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France |
| References |
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Mont Croustet, Ceyssac, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France