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Conichalcite from
Brandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK

Locality type:Mine
Classification
Species:Conichalcite
Formula:CaCu(AsO4)(OH)
Comments:Cooper & Stanley (1990): "Specimens labelled conichalcite are preserved in the Russell and Kingsbury Collections, BM(NH), but Kingsbury seems later to have considered the mineral to be a calcian duftite ('calcioduftite') although the X-ray powder pattern was 'close to (but by no means identical with) that of conichalcite (Kingsbury & Hartley, MS). Conichalcite has been found intimately associated with bayldonite forming a dark green crystalline crust on quartz (det. BM(NH): XRD, B. Young, pers. comm.)."
Habit:crystalline crust on quartz
Colour:dark green
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
References
References:Kingsbury, A.W.G. and Hartley, J. (MS) (1951) New occurrences of rare minerals in the northern part of the English Lake District: part 1.;
Young, B. (1987) Glossary of the minerals of the Lake District and adjoining areas. British Geological Survey, Newcastle upon Tyne, 104 pp.
Cooper, M.P. and Stanley, C.J. (1990) Minerals of the English Lake District: Caldbeck Fells. Natural History Museum Publications, London, 160 pp. (referring to Kingsbury & Hartley, 1951 and Young, 1987).
Data
Mineral Data:Click here to view Conichalcite data
Locality Data:Click here to view Brandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK
Nearest other occurrences of Conichalcite
1.6km (1.0 miles) Driggith Mine (Driggeth Mine), Caldbeck, Allerdale, Cumbria, England, UK
2.7km (1.7 miles) Old Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
 
Mineral and/or Locality  
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