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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Piemontite-(Sr) from
Itoigawa City, Niigata Prefecture, Japan


Locality type:City
Classification
Species:Piemontite-(Sr)
Formula:(CaSr)(AlAlMn3+)O[Si2O7][SiO4](OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Piemontite-(Sr) data
Locality Data:Click here to view Itoigawa City, Niigata Prefecture, Japan
Data Identifiers
Mindat Occurrence Record ID:432012
Long-form Identifier:1:3:432012:8
GUID (UUID V4):0
References
www-jm.eps.s.u-tokyo.ac.jp/2002cd-rom/pdf/j038/j038-003_e.pdf.
 
and/or  
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