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Opal from
Chessy copper mines, Chessy-les-Mines, Villefranche, Rhône, Auvergne-Rhône-Alpes, France

Locality type:Mine
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
References
References:[Le Cahier des Micromonteurs 1988, 4, p.6-46]
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Chessy copper mines, Chessy-les-Mines, Villefranche, Rhône, Auvergne-Rhône-Alpes, France
Nearest other occurrences of Opal
50.0km (31.1 miles) Le Crêt, Saint-Priest-en-Jarez, Saint-Etienne, Loire, Auvergne-Rhône-Alpes, France
57.8km (35.9 miles) Mont Semiol (Mont Semiouse; Mont Simiouse), Châtelneuf, Loire, Auvergne-Rhône-Alpes, France
72.8km (45.2 miles) La Roche, Besanceuil, Bonnay, Mâcon, Saône-et-Loire, Bourgogne-Franche-Comté, France
79.1km (49.2 miles) Gourniaud Mine, Lachaux, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
79.3km (49.3 miles) Bigay Mine, Lachaux, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
82.8km (51.4 miles) Roffin Mine, Lachaux, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
83.4km (51.8 miles) Gagnol Mine, Ris, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
83.5km (51.9 miles) Reliez, Ris, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
83.5km (51.9 miles) Etang de Reliez, Ris, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
84.3km (52.4 miles) Bancherelle Mine, Ris, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
 
Mineral and/or Locality  
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