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


Locality type:Quarry
Classification
Species:Orthoclase
Formula:K(AlSi3O8)
Comments:Crystals to 2 cm in contact zone.
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Albite
Data
Mineral Data:Click here to view Orthoclase data
Locality Data:Click here to view Henshaw Quarry, Bloomington, San Bernardino County, California, USA
Data Identifiers
Mindat Occurrence Record ID:686244
Long-form Identifier:1:3:686244:2
GUID (UUID V4):0
Nearest other occurrences of Orthoclase
3.2km (2.0 miles) ⓘJensen Quarry, Jurupa Mountains, Jurupa Valley, Riverside County, California, USA
3.8km (2.4 miles) ⓘCommercial 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
29.9km (18.6 miles) ⓘUnnamed abandoned quarry (Unnamed small gravel quarry), Claremont, Los Angeles County, California, USA
39.3km (24.4 miles) ⓘSouthern Pacific Silica Quarry (Southern Pacific deposit; Nuevo Mine; Southern Pacific Quarry; S.P. Silica Quarry; S.P. Mine; Nuevo Quarry), Nuevo, Lakeview Mountains, Riverside County, California, USA
50.0km (31.0 miles) ⓘUnnamed Feldspar occurrence [6], Seven Oaks, San Bernardino County, California, USA
51.9km (32.3 miles) ⓘUnnamed Corundum occurrences [2], Soboba Hot Springs (Ritchey Hot Springs; White Sulphur Spring), San Jacinto Mountains, Riverside County, California, USA
52.0km (32.3 miles) ⓘHazen Corundum prospect (Unnamed Corundum prospect), Soboba Hot Springs (Ritchey Hot Springs; White Sulphur Spring), San Jacinto Mountains, Riverside County, California, USA
73.0km (45.4 miles) ⓘSly Rick prospect (Green Centipede claim), Little Cahuilla Mountain, Cahuilla Mining District, Riverside County, California, USA
73.1km (45.4 miles) ⓘCrown Jewel Mine, Bautista Canyon, Cahuilla Mining District, Riverside 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Cooney, R.L. (1956), The mineralogy of the Jensen and Henshaw quarries near Riverside, California: Unpublished Master’s thesis, University of California at Los Angeles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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