| Locality type: | Mine |
| Classification |
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| Species: | Quartz var: Chalcedony |
| Formula: | SiO2 |
| Habit: | cryptocristalline crust |
| Quality for species: | Poor for species, only of interest for locality collectors. (#) |
| Abundance at site: | Very Rare |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Data |
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| Mineral Data: | Click here to view Chalcedony data |
| Locality Data: | Click here to view Longefay mine, Poule-les-Écharmeaux, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 675366 |
| Long-form Identifier: | 1:3:675366:5 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Chalcedony |
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| 3.8km (2.4 miles) | ⓘCreuzeval Quarry, Saint-Didier-sur-Beaujeu, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France |
| 9.6km (6.0 miles) | ⓘMonterniers Mines, Lantignié, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France |
| 25.2km (15.6 miles) | ⓘLes Ponts-Tarrets, Le Breuil, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France |
| 27.1km (16.8 miles) | ⓘChessy copper mines, Chessy, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France |
| 47.4km (29.4 miles) | ⓘLa Roche, Besanceuil, Bonnay, Mâcon, Saône-et-Loire, Bourgogne-Franche-Comté, France |
| 47.8km (29.7 miles) | ⓘLe remontenaud, Ambierle, Roanne, Loire, Auvergne-Rhône-Alpes, France |
| 50.1km (31.1 miles) | ⓘLes Rats Mine, Le Crozet, Roanne, Loire, Auvergne-Rhône-Alpes, France |
| 68.8km (42.8 miles) | ⓘMont Semiol, Châtelneuf, Montbrison, Loire, Auvergne-Rhône-Alpes, France |
| 70.7km (43.9 miles) | ⓘCollonges, Saint-Just-Saint-Rambert, Montbrison, Loire, Auvergne-Rhône-Alpes, France |
| 73.2km (45.5 miles) | ⓘLe Crêt, Saint-Priest-en-Jarez, Saint-Étienne, Loire, Auvergne-Rhône-Alpes, France |
| References |
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Longefay mine, Poule-les-Écharmeaux, Villefranche-sur-Saône, Rhône, Auvergne-Rhône-Alpes, France