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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Plancheite from
Driggith Mine, Caldbeck, Allerdale, Cumbria, England, UK


Locality type:Mine
Classification
Species:Plancheite
Formula:Cu8(Si8O22)(OH)4 · H2O
Comments:Cooper & Stanley (1990): "Known only from two small specimens from the 30fm level dump (Kingsbury Collection, BM(NH); as a radiating fibrous mineral with chrysocolla. The first British occurrence. Listed by Kingsbury (MS1) but otherwise unpublished."
Confirmation
Validity:Erroneously Reported
Data
Mineral Data:Click here to view Plancheite data
Locality Data:Click here to view Driggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:8722
Long-form Identifier:1:3:8722:3
GUID (UUID V4):0
References
Kingsbury, A.W.G. and Hartley, J. (MS1) (1953 or later) Investigation of the minerals of the Lake District, especially the Caldbeck area, in collaboration with J. Hartley. List of minerals found by us at many localities examined 1947-.
Young, B. (1987) Glossary of the minerals of the Lake District and adjoining areas. British Geological Survey, Newcastle upon Tyne. 104pp.
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
 
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