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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Sillimanite from
Tsomtsaub, Dâures Constituency, Erongo Region, Namibia


Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Tsomtsaub, Dâures Constituency, Erongo Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:768229
Long-form Identifier:1:3:768229:2
GUID (UUID V4):0
References
von Bezing, Ludi (2007) Namibia - Minerals and Localities (1st ed.). Bode Verlag GmbH.
 
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