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


Locality type:Quarry
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Pyrrhotite
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Henshaw Quarry, Bloomington, San Bernardino County, California, USA
Data Identifiers
Mindat Occurrence Record ID:686236
Long-form Identifier:1:3:686236:7
GUID (UUID V4):0
Nearest other occurrences of Calcite
3.2km (2.0 miles) ⓘJensen Quarry, Jurupa Mountains, Jurupa Valley, Riverside County, California, USA
3.8km (2.3 miles) ⓘCrestmore quarries, Crestmore, 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
4.5km (2.8 miles) ⓘWet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
6.9km (4.3 miles) ⓘOld City Quarry (City Quarry; North Hill Quarry; Quarry Hill; Fairmount), Riverside, Riverside County, California, USA
7.1km (4.4 miles) ⓘSlover Mountain Quarry (California Portland Cement Company Quarry; Colton Marble), West Colton, San Bernardino County, California, USA
7.2km (4.5 miles) ⓘGlen Avon Quarry (Glen Avon Limestone deposit; Mathews), Glen Avon, Riverside County, California, USA
28.0km (17.4 miles) ⓘBig Horn Mine [2] (Bighorn Mine; Lapis Lazuli deposit), Stoddard Peak, San Bernardino County, California, USA
29.4km (18.3 miles) ⓘCascade Canyon, San Bernardino County, California, USA
37.0km (23.0 miles) ⓘBlue Light Mine (Harvey; Silverado; Dunlap Light Blue Mine), Silverado, Orange 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Cooney, R.L. (1956), The mineralogy of the Jensen and Henshaw quarries near Riverside, California: Unpublished Master’s thesis, University of California at Los Angeles: 35
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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