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
San Vicente Creek tunnel, San Vicente Creek, Davenport, Santa Cruz County, California, USA


Locality type:Tunnel
Classification
Species:Calcite
Formula:CaCO3
Comments:Well-developed crystals.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view San Vicente Creek tunnel, San Vicente Creek, Davenport, Santa Cruz County, California, USA
Data Identifiers
Mindat Occurrence Record ID:684205
Long-form Identifier:1:3:684205:5
GUID (UUID V4):0
References
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 118
 
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