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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Ramsdellite from
Hirotani mine, Niigata City, Niigata Prefecture, Japan


Locality type:Mine
Classification
Species:Ramsdellite
Formula:Mn4+O2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ramsdellite data
Locality Data:Click here to view Hirotani mine, Niigata City, Niigata Prefecture, Japan
Data Identifiers
Mindat Occurrence Record ID:540217
Long-form Identifier:1:3:540217:5
GUID (UUID V4):0
References
University of Tokyo collection
 
and/or  
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