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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Ferrobustamite from
Scawt Hill, Larne, County Antrim, Northern Ireland, UK


Locality type:Volcanic Plug
Classification
Species:Ferrobustamite
Formula:CaFe2+(Si2O6)
Comments:In American Mineralogist, Volume 60, pages 209-212, 1975, the highest iron content of wollastonite is 2.23 percent FeO, in the wollastonite composition field.
Confirmation
Validity:Erroneously Reported
Data
Mineral Data:Click here to view Ferrobustamite data
Locality Data:Click here to view Scawt Hill, Larne, County Antrim, Northern Ireland, UK
Data Identifiers
Mindat Occurrence Record ID:96760
Long-form Identifier:1:3:96760:8
GUID (UUID V4):0
References
Mason, Brian (1975) Compositional limits of wollastonite and bustamite. American Mineralogist, 60 (3-4) 209-212
 
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