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Opal from
Porriño quarries, Porriño, Pontevedra, Galicia, Spain


Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Porriño quarries, Porriño, Pontevedra, Galicia, Spain
Data Identifiers
Mindat Occurrence Record ID:602974
Long-form Identifier:1:3:602974:6
GUID (UUID V4):0
Nearest other occurrences of Opal
4.1km (2.5 miles) ⓘCillarga Quarry, Ponteareas, Pontevedra, Galicia, Spain
15.6km (9.7 miles) ⓘEiras quarry, Gondomil e Safins, Valença do Minho, Viana do Castelo, Portugal
98.5km (61.2 miles) ⓘSanta Comba Mine (Barilongo mine), Santa Comba, A Coruña, Galicia, Spain
References
Calvo, M.; Viñals, J.; Vila, F. (2009) Mineralogy of the pegmatites and miarolitic cavities in the granitic batholit of Porriño, Pontevedra, Galicia, Spain. Mineral Up, (2009-1), 6-23.
 
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