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Opal from
Água de Pau Volcano, São Miguel, Azores, Portugal


Locality type:Volcanic Complex
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Aegirine1 photo of Opal associated with Aegirine at this locality.
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Água de Pau Volcano, São Miguel, Azores, Portugal
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:739063
Long-form Identifier:1:3:739063:0
GUID (UUID V4):65501408-7dd6-4d0a-aa6d-d8ef7eef90f6
References
Reference Search (possible matching items)
Journal (article/letter/editorial)
compositions consistent with opal; we interpret these crystals as opal replacements after esquireite...with or embedded in white, massive witherite and/or opal. Witherite, in particular, seems to be almost always...contemporaneously with one another, although the opal replacements noted above obviously postdate esquireite...esquireite. Besides sanbornite, witherite, and opal, at the Esquire #1 claim esquireite is also associated...R., CAMALLI, M., CARROZZINI, B., CASCARANO, G.L., DE CARO, L., GIACOVAZZO, C., POLIDORI, G., & SPAGNA
 
矿物 and/or 产地  
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