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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Orpiment from
Solfatara di Pozzuoli, Pozzuoli, Metropolitan City of Naples, Campania, Italy


Classification
Species:Orpiment
Formula:As2S3
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Orpiment data
Locality Data:Click here to view Solfatara di Pozzuoli, Pozzuoli, Metropolitan City of Naples, Campania, Italy
Data Identifiers
Mindat Occurrence Record ID:258995
Long-form Identifier:1:3:258995:4
GUID (UUID V4):0
References
Russo, M., Campostrini, I., Demartin, F. (2017) I minerali di origine fumarolica dei Campi Flegrei: Solfatara di Pozzuoli (Napoli) e dintorni [The fumarolic minerals of the Phlegraean Fields: Solfatara of Pozzuoli (Naples) and surroundings]. Micro, 15 (3). 122-192
 
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