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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Ursilite from
South Khanneshin U-Th-REE occurrence, Khanneshin complex (Khanneshin carbonatite complex), Reg District, Helmand, Afghanistan


Locality type:Occurrence
Classification
Species:'Ursilite' (not an IMA approved species)
Formula:(Mg/Ca)4(UO2)4(Si2O5)5.5(OH)5 · 13H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ursilite data
Locality Data:Click here to view South Khanneshin U-Th-REE occurrence, Khanneshin complex (Khanneshin carbonatite complex), Reg District, Helmand, Afghanistan
Data Identifiers
Mindat Occurrence Record ID:714223
Long-form Identifier:1:3:714223:9
GUID (UUID V4):0
References
Orris, G.J., Bliss, J.D. (2002) Mine and mineral occurrences of Afghanistan. Open-File Report 2002-110. US Geological Survey doi:10.3133/ofr02110
 
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