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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Halloysite from
Orchi, Conca della Campania, Roccamonfina Volcanic Complex, Caserta, Campania, Italy


Locality type:Outcrop
Classification
Species:Halloysite
Formula:Al2Si2O5(OH)4 · n(H2O)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Halloysite data
Locality Data:Click here to view Orchi, Conca della Campania, Roccamonfina Volcanic Complex, Caserta, Campania, Italy
Data Identifiers
Mindat Occurrence Record ID:348657
Long-form Identifier:1:3:348657:3
GUID (UUID V4):0
References
Ghiara, Lirer, Stanzione (1973): Contributo alla conoscenza vulcanologica e petrografica del vulcano di Roccamonfina. Russo, M. (1986): Leucite ed altri minerali nelle vulcaniti primordiali del Roccamonfina. Notiziario del Gruppo Mineralogico Geologico Napoletano, 15, 13-19.
 
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