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


Locality type:Volcanic Plug
Classification
Species:Okenite
Formula:Ca10Si18O46 · 18H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Okenite data
Locality Data:Click here to view Scawt Hill, Larne, County Antrim, Northern Ireland, UK
Data Identifiers
Mindat Occurrence Record ID:207108
Long-form Identifier:1:3:207108:4
GUID (UUID V4):0
References
Tilley, C. E., Alderman, A. R. (1934) Progressive metasomatism in the flint nodules of the Scawt Hill contact-zone. Mineralogical Magazine and Journal of the Mineralogical Society, 23 (144) 513-518 doi:10.1180/minmag.1934.023.144.06
 
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