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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Oligoclase from
Heavy Weight Mine, Heavy Weight Hill, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA


Locality type:Mine
Classification
Species:Albite var: Oligoclase
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
Comments:Phenocrysts to 0.4 inches (1 cm) diameter in wall rocks.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Oligoclase data
Locality Data:Click here to view Heavy Weight Mine, Heavy Weight Hill, Helvetia, Helvetia-Rosemont Mining District, Pima County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:265449
Long-form Identifier:1:3:265449:2
GUID (UUID V4):0
Nearest other occurrences of Oligoclase
16.4km (10.2 miles) ⓘOld Baldy prospects, Littleshot Camp, Madera Canyon, Old Baldy Mining District, Santa Cruz County, Arizona, USA
32.4km (20.1 miles) ⓘGringo Mine (Gringo Mine group of claims; Francis group of claims; Temporal group of claims), Temporal Gulch, Wrightson Mining District, Santa Cruz County, Arizona, USA
51.9km (32.3 miles) ⓘFour Metals Mine, Red Hill, Providencia Canyon, Patagonia Mining District, Patagonia Mountains, Santa Cruz County, Arizona, USA
References
Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 110.
 
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