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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Faujasite Subgroup from
Newberry Caldera, Newberry National Volcanic Monument, Deschutes County, Oregon, USA


Locality type:Caldera
Classification
Species:'Faujasite Subgroup' (not an IMA approved species)
Formula:M3.5[Al7Si17O48] · 32H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Faujasite Subgroup data
Locality Data:Click here to view Newberry Caldera, Newberry National Volcanic Monument, Deschutes County, Oregon, USA
Data Identifiers
Mindat Occurrence Record ID:859645
Long-form Identifier:1:3:859645:1
GUID (UUID V4):0
References
Mineralogy of 10 Geothermal boreholes drilled in and around the Newberry Caldera U.S. Geological Survey Professional Paper, Issue 1578 By Keith E. Bargar, Terry E. C. Keith 1999
 
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