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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Stewartite from
Clementine II pegmatite, Okatjimukuju Farm 55 (Friedrichsfelde Farm), Karibib Constituency, Erongo Region, Namibia


Locality type:Pegmatite
Classification
Species:Stewartite
Formula:Mn2+Fe23+(PO4)2(OH)2 · 8H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stewartite data
Locality Data:Click here to view Clementine II pegmatite, Okatjimukuju Farm 55 (Friedrichsfelde Farm), Karibib Constituency, Erongo Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:309753
Long-form Identifier:1:3:309753:3
GUID (UUID V4):0
References
Keller, Paul, von Knorring, Oleg (1989) Pegmatites at the Okatjimukuju farm, Karibib, Namibia. Part I: Phosphate mineral associations of the Clementine II pegmatite. European Journal of Mineralogy, 1 (4). 567-594 doi:10.1127/ejm/1/4/0567
 
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