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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Mirabilite from
Espartinas Saltworks, Ciempozuelos, Community of Madrid, Spain


Classification
Species:Mirabilite
Formula:Na2SO4 · 10H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Mirabilite data
Locality Data:Click here to view Espartinas Saltworks, Ciempozuelos, Community of Madrid, Spain
Data Identifiers
Mindat Occurrence Record ID:694361
Long-form Identifier:1:3:694361:5
GUID (UUID V4):0
References
González del Tánago, Ch. and González del Tánago, J. (2002). Minerales y minas de Madrid
 
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