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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Fassaite from
Myojin Island, Imabari City, Ehime Prefecture, Japan


Locality type:Island
Classification
Species:Augite var: Fassaite
Formula:(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Fassaite data
Locality Data:Click here to view Myojin Island, Imabari City, Ehime Prefecture, Japan
Data Identifiers
Mindat Occurrence Record ID:104164
Long-form Identifier:1:3:104164:4
GUID (UUID V4):0
References
Shimazaki, Hidehiko, Bunno, Michiaki, Ozawa, Tohru (1984) Sadanagaite and magnesio-sadanagaite, new silica-poor members of calcic amphibole from Japan. American Mineralogist, 69 (5-6) 465-471
 
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