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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Fergusonite-(Y) from
Stettin pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA


Locality type:Pluton
Classification
Species:Fergusonite-(Y)
Formula:YNbO4
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Fergusonite-(Y) data
Locality Data:Click here to view Stettin pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA
Data Identifiers
Mindat Occurrence Record ID:558204
Long-form Identifier:1:3:558204:4
GUID (UUID V4):0
References
Hanson, S.L., et al (1999) Rocks and Minerals, 74, 184
 
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