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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Stilbite Subgroup from
Vetralla, Viterbo Province, Lazio, Italy


Locality type:Commune
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Vetralla, Viterbo Province, Lazio, Italy
Data Identifiers
Mindat Occurrence Record ID:59145
Long-form Identifier:1:3:59145:0
GUID (UUID V4):0
References
 
and/or  
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