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
Blue Light Mine (Harvey; Silverado; Dunlap Light Blue Mine), Silverado, Orange County, California, USA


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Blue Light Mine (Harvey; Silverado; Dunlap Light Blue Mine), Silverado, Orange County, California, USA
Data Identifiers
Mindat Occurrence Record ID:700310
Long-form Identifier:1:3:700310:3
GUID (UUID V4):0
Nearest other occurrences of Calcite
16.5km (10.2 miles) ⓘOrtega Mine (Old Dominion Mine), Rancho Santa Margarita, Orange County, California, USA
29.5km (18.3 miles) ⓘLaguna Beach, Orange County, California, USA
29.8km (18.5 miles) ⓘEpsomite occurrences, Laguna Beach, Orange County, California, USA
32.0km (19.9 miles) ⓘGlen Avon Quarry (Glen Avon Limestone deposit; Mathews), Glen Avon, Riverside County, California, USA
33.3km (20.7 miles) ⓘOld City Quarry (City Quarry; North Hill Quarry; Quarry Hill; Fairmount), Riverside, Riverside County, California, USA
33.8km (21.0 miles) ⓘJensen Quarry, Jurupa Mountains, Jurupa Valley, Riverside County, California, USA
35.1km (21.8 miles) ⓘWet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
35.7km (22.2 miles) ⓘCommercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
35.8km (22.3 miles) ⓘCrestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
37.0km (23.0 miles) ⓘHenshaw Quarry, Bloomington, San Bernardino County, California, USA
References
Robert Housely
 
and/or  
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