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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Spionkopite from
Morning Star Mine, Kessler Peak, Ivanpah Mountains, Ivanpah Mining District, San Bernardino County, California, USA


Locality type:Mine
Classification
Species:Spionkopite
Formula:Cu39S28
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Spionkopite data
Locality Data:Click here to view Morning Star Mine, Kessler Peak, Ivanpah Mountains, Ivanpah Mining District, San Bernardino County, California, USA
Data Identifiers
Mindat Occurrence Record ID:783299
Long-form Identifier:1:3:783299:4
GUID (UUID V4):0
References
Ronald Wynn Sheets, James R. Craig, Robert J. Bodnar (1995) Composition And Occurrence Of Electrum At The Morning Star Deposit, San Bernardino County, California: Evidence For Remobilization Of Gold And Silver. Canadian Mineralogist 33:137-151
 
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