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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Montmorillonite from
Rubikon Mine, Okongava Ost Farm 72, Karibib Constituency, Erongo Region, Namibia


02644940017764721227581.jpg
Montmorillonite

Rubikon Mine, Okongava Ost Farm 72, Karibib Constituency, Erongo Region, Namibia
02644940017764721227581.jpg
Montmorillonite

Rubikon Mine, Okongava Ost Farm 72, Karibib Constituency, Erongo Region, Namibia
09237950017764721233621.jpg
Montmorillonite

Rubikon Mine, Okongava Ost Farm 72, Karibib Constituency, Erongo Region, Namibia
Locality type:Mine
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view Rubikon Mine, Okongava Ost Farm 72, Karibib Constituency, Erongo Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:708705
Long-form Identifier:1:3:708705:9
GUID (UUID V4):0
References
King, Van (n.d.) Personal communcation.
 
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