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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Bournonite from
Wheal Clarence (Nancekuke Mine; incl. New Dolcoath Mine), Porthtowan, St Agnes, Cornwall, England, UK


Locality type:Mine
Classification
Species:Bournonite
Formula:PbCuSbS3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Bournonite data
Locality Data:Click here to view Wheal Clarence (Nancekuke Mine; incl. New Dolcoath Mine), Porthtowan, St Agnes, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:670759
Long-form Identifier:1:3:670759:0
GUID (UUID V4):0
References
Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.pp.486-490
 
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