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 from
Unspecified REE occurrence [4], Box Springs Mountains, Riverside County, California, USA


Locality type:Occurrence
Classification
Species:'Fergusonite' (not an IMA approved species)
Comments:Occurs as crystals to 1½ inches (3.75 cm) long.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Fergusonite data
Locality Data:Click here to view Unspecified REE occurrence [4], Box Springs Mountains, Riverside County, California, USA
Data Identifiers
Mindat Occurrence Record ID:650602
Long-form Identifier:1:3:650602:5
GUID (UUID V4):0
References
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 185
 
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