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Opal from
Roca-Neyra, Perrier, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Classification
Species:Opal
Formula:SiO2 · nH2O
Habit:blue-grey marbles yellow marbles on phillipsite
Colour:blue-gray ; yellow ; colorless
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Common
Confirmation
Validity:Unconfirmed/Questioned
References
References:my collection
Associated Minerals Based on Photo Data:
Phillipsite10 photos of Opal associated with Phillipsite at this locality.
Zircon1 photo of Opal associated with Zircon at this locality.
Chabazite1 photo of Opal associated with Chabazite at this locality.
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Roca-Neyra, Perrier, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Nearest other occurrences of Opal
15.8km (9.8 miles) Mineral spring, Saint-Nectaire, Champeix, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
19.0km (11.8 miles) Gergovie, La-Roche-Blanche, Veyre-Monton, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
20.0km (12.4 miles) Côte des Pompes, Saulzet-le-Chaud, Clermont-Ferrand, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
29.8km (18.5 miles) La Violette farm, Saint-Beauzire, Brioude, Haute-Loire, Auvergne-Rhône-Alpes, France
37.9km (23.5 miles) Puy de Tunisset, Saint-Ours-les-Roches, Pontgibaud, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
49.9km (31.0 miles) La Barre Mine (La Martinèche Mine), Saint-Jacques-d'Ambur, Pontgibaud, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
55.4km (34.4 miles) Puy de Menoyre, Menet, Cantal, Auvergne-Rhône-Alpes, France
56.3km (35.0 miles) Moulergues, Chastel, Brioude, Haute-Loire, Auvergne-Rhône-Alpes, France
57.3km (35.6 miles) Reliez, Lachaux, Puy-Guillaume, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
57.3km (35.6 miles) Etang de Reliez, Lachaux, Puy-Guillaume, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
 
Mineral and/or Locality  
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