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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Magnetite from
Ikka-Grønnedal Complex (Ika-Grønnedal), Sermersooq, Greenland


Locality type:Complex
Classification
Species:Magnetite
Formula:Fe2+Fe23+O4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Magnetite data
Locality Data:Click here to view Ikka-Grønnedal Complex (Ika-Grønnedal), Sermersooq, Greenland
Data Identifiers
Mindat Occurrence Record ID:69789
Long-form Identifier:1:3:69789:7
GUID (UUID V4):0
References
Bedford, C.M., 1989. The mineralogy, geochemistry and petrogenesis of the Gronnedal-Ika complex, southwest Greenland. Unpublished PhD thesis, University of Durham
Pearce, N. J. G., Leng, M. J., Emeleus, C. H., Bedford, C. M. (1997) The origins of carbonatites and related rocks from the Grønnedal-Íka Nepheline Syenite complex, South Greenland: C-O-Sr isotope evidence. Mineralogical Magazine, 61 (407) 515-529 doi:10.1180/minmag.1997.061.407.04
Aðalsteinsdóttir, Sigríður María, Stockmann, Gabrielle J., Sturkell, Erik, Bali, Enikő, Guðfinnsson, Guðmundur H., Stefánsson, Andri (2025) Petrological Studies and Geochemical Modelling of Water–Rock Interactions in the Grønnedal-Íka Alkaline Complex Generating Ikaite Deposition in Ikka Fjord, SW Greenland. Minerals, 15 (4). doi:10.3390/min15040373
 
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