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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Anorthite from
Stella Blue Mine (Patagonia Mine), Mowry Hill, Mowry Wash, Mowry, Patagonia Mining District, Patagonia Mountains, Santa Cruz County, Arizona, USA


Locality type:Mine
Classification
Species:Anorthite
Formula:Ca(Al2Si2O8)
Comments:Occurs as labradorite-andesine in quartz monzonite in phenocrysts to 1 inch diameter.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Anorthite data
Locality Data:Click here to view Stella Blue Mine (Patagonia Mine), Mowry Hill, Mowry Wash, Mowry, Patagonia Mining District, Patagonia Mountains, Santa Cruz County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:992483
Long-form Identifier:1:3:992483:3
GUID (UUID V4):0
Nearest other occurrences of Anorthite
53.1km (33.0 miles) ⓘTucson meteorite (Irwin-Ainsa meteorite), Box Canyon, Pima County, Arizona, USA
66.8km (41.5 miles) ⓘLucky Cuss Mine, Tombstone Mining District, Cochise County, Arizona, USA
80.1km (49.7 miles) ⓘBlack Mountain, Sierrita Mountains, Tohono O'odham Nation Reservation, Arizona, USA
91.1km (56.6 miles) ⓘSentinel Peak ('A' Mountain) - SW side, Sentinel Peak area, Tucson, Amole Mining District, Tucson Mountains, Pima County, Arizona, USA
References
Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, AZ, USGS Bull. 582: 301.
 
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