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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Kupletskite from
Brønnebukta, Siktesøya, Porsgrunn, Telemark, Norway


Locality type:Pegmatite
Classification
Species:Kupletskite
Formula:K2NaMn72+Ti2[Si4O12]2O2(OH)4F
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Kupletskite data
Locality Data:Click here to view Brønnebukta, Siktesøya, Porsgrunn, Telemark, Norway
Data Identifiers
Mindat Occurrence Record ID:678397
Long-form Identifier:1:3:678397:6
GUID (UUID V4):0
References
Larsen, Alf Olav; Andersen, Frode; Dahlgren, Sven; Larsen, Knut Edvard; Burvald, Ingulv - Ed. (2010) The Langesundsfjord - History, geology, pegmatites, minerals. Bode Verlag Gmbh. 240 pp.
 
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