| Classification |
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| Species: | Quartz var: Chalcedony |
| Formula: | SiO2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Chalcedony data |
| Locality Data: | Click here to view Mané Tanguy, Guern, Pontivy, Morbihan, Brittany, France |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 287082 |
| Long-form Identifier: | 1:3:287082:3 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Chalcedony |
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| 1.3km (0.8 miles) | ⓘKerroc'h, Guern, Pontivy, Morbihan, Brittany, France |
| 1.4km (0.9 miles) | ⓘQuistiav (Quistiave), Guern, Pontivy, Morbihan, Brittany, France |
| 20.3km (12.6 miles) | ⓘLead mine, Saint-Maudé, Baud, Pontivy, Morbihan, Brittany, France |
| 20.9km (13.0 miles) | ⓘLe Rhun Mine, Plélauff, Guingamp, Côtes-d'Armor, Brittany, France |
| 23.6km (14.7 miles) | ⓘLe Stang quarry, Guilligomarc'h, Quimper, Finistère, Brittany, France |
| 26.4km (16.4 miles) | ⓘLa Lande quarry, Plumelin, Pontivy, Morbihan, Brittany, France |
| 46.1km (28.6 miles) | ⓘKernivaigne quarry, Riec-sur-Bélon, Quimper, Finistère, Brittany, France |
| 51.7km (32.1 miles) | ⓘLa Villeder, Le Roc Saint-André, Pontivy, Morbihan, Brittany, France |
| 57.6km (35.8 miles) | ⓘLe Ruguel, Collorec, Châteaulin, Finistère, Brittany, France |
| 62.0km (38.5 miles) | ⓘDuer, Sarzeau, Vannes, Morbihan, Brittany, France |
| References |
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