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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Illite from
Boa Vista pegmatite, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil


Locality type:Pegmatite
Classification
Species:Muscovite var: Illite
Formula:K0.65Al2.0[Al0.65Si3.35O10](OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Illite data
Locality Data:Click here to view Boa Vista pegmatite, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil
Data Identifiers
Mindat Occurrence Record ID:49725
Long-form Identifier:1:3:49725:1
GUID (UUID V4):0
References
Cassedanne, J. P., Cassedanne, J. O. (1982) Presence de legrandite dans une pegmatite de Minas Gerais, Bresil. The Canadian Mineralogist, 20 (1) 87-89
 
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