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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Robertsite from
Shungura formation, Lower Omo Valley, Southern Nations Nationalities and Peoples' Region, Ethiopia


Locality type:Formation
Classification
Species:Robertsite
Formula:Ca2Mn33+(PO4)3O2 · 3H2O
Comments:Mitridatite-robertsite series.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Robertsite data
Locality Data:Click here to view Shungura formation, Lower Omo Valley, Southern Nations Nationalities and Peoples' Region, Ethiopia
Data Identifiers
Mindat Occurrence Record ID:314199
Long-form Identifier:1:3:314199:1
GUID (UUID V4):0
References
Rogers, Robert J., Brown, Francis H. (1979) Authigenic mitridatite from the Shungura Formation, southwestern Ethiopia. American Mineralogist, 64 (1-2) 169-171
 
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