Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Opal from
Pisciarelli di Agnano, Pozzuoli, Metropolitan City of Naples, Campania, Italy


Locality type:Village
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 Pisciarelli di Agnano, Pozzuoli, Metropolitan City of Naples, Campania, Italy
Data Identifiers
Mindat Occurrence Record ID:968628
Long-form Identifier:1:3:968628:1
GUID (UUID V4):0
Nearest other occurrences of Opal
0.4km (0.2 miles) ⓘSolfatara di Pozzuoli, Pozzuoli, Metropolitan City of Naples, Campania, Italy
0.4km (0.2 miles) ⓘ"Bocca Grande" fumarole, Solfatara di Pozzuoli, Pozzuoli, Metropolitan City of Naples, Campania, Italy
0.5km (0.3 miles) ⓘAntiniana (Scarfoglio), Pozzuoli, Metropolitan City of Naples, Campania, Italy
23.6km (14.7 miles) ⓘVesuvius fumaroles at the crater bottom, Torre del Greco, Metropolitan City of Naples, Campania, Italy
23.9km (14.9 miles) ⓘVesuvius fumaroles on eastern crater rim, Ottaviano, Metropolitan City of Naples, Campania, Italy
23.9km (14.9 miles) ⓘFumarole B5 ("Cotunnite pit"), Vesuvius fumaroles on eastern crater rim, Ottaviano, Metropolitan City of Naples, Campania, Italy
24.2km (15.0 miles) ⓘBoscotrecase thermal area ("Tenorite pit"), Boscotrecase, Metropolitan City of Naples, Campania, Italy
References
Russo M. (1984): La jarosite de "I Pisciarelli" (Napoli). Rivista Mineralogica Italiana, 8, 3 (3-1984), 109-110.
 
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