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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Alunite from
Mount Vosianisy, Androka, Ampanihy District, Atsimo-Andrefana, Madagascar


Locality type:Mountain
Classification
Species:Alunite
Formula:KAl3(SO4)2(OH)6
Comments:Compact masses of several kg.
Colour:white
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Alunite data
Locality Data:Click here to view Mount Vosianisy, Androka, Ampanihy District, Atsimo-Andrefana, Madagascar
Data Identifiers
Mindat Occurrence Record ID:367115
Long-form Identifier:1:3:367115:3
GUID (UUID V4):0
References
Behier, Jean (1960) Travaux minéralogiques, in Rapport Annuel du Service géologique pour 1960. Rapport Annuel du Service géologique, 1960. 181-199
 
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