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
Henshaw Quarry, Bloomington, San Bernardino County, California, USA


Locality type:Quarry
Classification
Species:Albite var: Oligoclase
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
Comments:Occurs in the contact zone.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Oligoclase data
Locality Data:Click here to view Henshaw Quarry, Bloomington, San Bernardino County, California, USA
Data Identifiers
Mindat Occurrence Record ID:686249
Long-form Identifier:1:3:686249:7
GUID (UUID V4):0
Nearest other occurrences of Oligoclase
3.8km (2.4 miles) ⓘCommercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
4.5km (2.8 miles) ⓘWet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
22.2km (13.8 miles) ⓘCajalco Mine (Cajalco Tin Mine; Cajalco Dumortierite occurrence), El Cerrito, Riverside County, California, USA
79.8km (49.6 miles) ⓘTourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala Mining District, San Diego County, California, USA
84.0km (52.2 miles) ⓘRock Corral, Landers, San Bernardino County, California, USA
95.4km (59.3 miles) ⓘPacoima Canyon pegmatite locality (Pacoima Canyon Allanite pegmatite; Allanite locality), Pacoima Canyon, Los Angeles County, California, USA
References
Cooney, R.L. (1956), The mineralogy of the Jensen and Henshaw quarries near Riverside, California: Unpublished Master’s thesis, University of California at Los Angeles
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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