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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Phengite from
As Sifah, Saih Hatat, Muscat Governorate, Oman


Locality type:Town
Classification
Species:Muscovite var: Phengite
Formula:KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Phengite data
Locality Data:Click here to view As Sifah, Saih Hatat, Muscat Governorate, Oman
Data Identifiers
Mindat Occurrence Record ID:217508
Long-form Identifier:1:3:217508:9
GUID (UUID V4):0
References
Jour.Met.Geo 19:233–248 (2001)
 
and/or  
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