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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Aphthitalite from
Accesa mine, Massa Marittima, Grosseto Province, Tuscany, Italy


Locality type:Mine
Classification
Species:Aphthitalite
Formula:K3Na(SO4)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Aphthitalite data
Locality Data:Click here to view Accesa mine, Massa Marittima, Grosseto Province, Tuscany, Italy
Data Identifiers
Mindat Occurrence Record ID:949258
Long-form Identifier:1:3:949258:5
GUID (UUID V4):0
References
Dill, H. (1979) Lagerstättenkundliche Untersuchungen zur Entstehung der Pyrit-führenden Blei-Kupfer-Zink-Lagerstätte Accesa (SW-Toskana). Mineralium Deposita, 14 (1). 57-80 doi:10.1007/bf00201867
 
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