Vote for your favorite mineral in #MinCup26! - Monazite-(Ce) vs. Andalusite
It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Opal from
El Negral quarry, Pozo Alcón, Jaén, Andalusia, Spain


Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view El Negral quarry, Pozo Alcón, Jaén, Andalusia, Spain
Data Identifiers
Mindat Occurrence Record ID:1295926
Long-form Identifier:1:3:1295926:8
GUID (UUID V4):0
Nearest other occurrences of Opal
40.4km (25.1 miles) ⓘGypsum outcrop, Galera, Granada, Andalusia, Spain
52.2km (32.4 miles) ⓘGeneral mines (Cortijo Virginia), Escúllar, Las Tres Villas, Almería, Andalusia, Spain
60.3km (37.5 miles) ⓘSan José Mine, Bayarque, Almería, Andalusia, Spain
References
José Miguel Sola. Multiple methods, XRD thin sheet, XRD, Optical, electrical and chemical properties. There are other silicates that we have not been able to identify due to the lack of adequate methods. In our studies we have not seen analcime.
 
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