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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Cummingtonite from
Arkaroola Bore, Arkaroola (Arkaroola Wilderness Sanctuary; Arkaroola Station), Pastoral Unincorporated Area, South Australia, Australia


Classification
Species:Cummingtonite
Formula:◻Mg2Mg5(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cummingtonite data
Locality Data:Click here to view Arkaroola Bore, Arkaroola (Arkaroola Wilderness Sanctuary; Arkaroola Station), Pastoral Unincorporated Area, South Australia, Australia
Data Identifiers
Mindat Occurrence Record ID:928682
Long-form Identifier:1:3:928682:5
GUID (UUID V4):0
References
Noble, R. J.; Just, J.; Johnson, J. E. (1983) Catalogue of South Australian Minerals - 1983 - Handbook 7 (5th ed.). Department of Mines and Energy, South Australia. 253 pp.
 
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