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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Chrysocolla from
North Mountain Mine (Stenger Mine; Copper Lume Mine), North Mountain, Montgomery County, Arkansas, USA


Locality type:Mine
Classification
Species:Chrysocolla
Formula:Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chrysocolla data
Locality Data:Click here to view North Mountain Mine (Stenger Mine; Copper Lume Mine), North Mountain, Montgomery County, Arkansas, USA
Data Identifiers
Mindat Occurrence Record ID:101920
Long-form Identifier:1:3:101920:9
GUID (UUID V4):0
References
Rocks & Min.: 63: 113.
64:294
Sick (1984).
 
and/or  
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