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


Locality type:Formation
Classification
Species:'Smectite Group' (not an IMA approved species)
Formula:A0.3D2-3[T4O10]Z2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Smectite Group 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:314202
Long-form Identifier:1:3:314202:8
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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