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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Pumpellyite-(Mg) from
Grootberg Pass, Grootberg Mountain, Khorixas, Kunene Region, Namibia


Locality type:Pass
Classification
Species:Pumpellyite-(Mg)
Formula:Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Comments:Found with zeolites in basaltic vesicles but refined analysis has not been carried out.
Colour:Blackish-dark green
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Pumpellyite-(Mg) data
Locality Data:Click here to view Grootberg Pass, Grootberg Mountain, Khorixas, Kunene Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:856503
Long-form Identifier:1:3:856503:7
GUID (UUID V4):0
References
von Bezing, Ludi (2007) Namibia - Minerals and Localities (1st ed.). Bode Verlag GmbH.p.683
 
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