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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Augite from
48-55 Mine, Vesper Peak, Sultan Mining District, Snohomish County, Washington, USA


Locality type:Prospect
Classification
Species:Augite
Formula:(CaxMgyFez)(Mgy1Fez1)Si2O6
Habit:sharp to corroded crystals up to 7/8"
Colour:dark green
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Augite data
Locality Data:Click here to view 48-55 Mine, Vesper Peak, Sultan Mining District, Snohomish County, Washington, USA
Data Identifiers
Mindat Occurrence Record ID:93801
Long-form Identifier:1:3:93801:3
GUID (UUID V4):0
References
Valentine, Grant M., Huntting, Marshall T. (1960) Part II - Metallic Minerals, in Inventory of Washington Minerals. Vol II. Bulletin 37, Washington Geological Survey.p.83
Cannon, Bart (1975) Minerals of Washington. Cordilleran. 184 pp.pages 52, 54, 99, 137, 152
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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