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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Beaverite-(Cu) from
Roughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK


Locality type:Mine
Classification
Species:Beaverite-(Cu)
Formula:Pb(Fe23+Cu)(SO4)2(OH)6
Comments:Bridges et al. (2011): "Thin earthy to micro-crystalline crusts of yellow-brown material in cavities in quartz, resembling some forms of beaverite, were checked by EDS and found to contain lead, copper and iron. The copper peaks were quite significant, but detailed microprobe (WDS/EPM) analysis would be necessary to be sure the mineral was not plumbojarosite."
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Beaverite-(Cu) data
Locality Data:Click here to view Roughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:14934
Long-form Identifier:1:3:14934:5
GUID (UUID V4):0
Nearest other occurrences of Beaverite-(Cu)
0.6km (0.4 miles) ⓘThief Gills, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.6km (0.4 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.1km (1.3 miles) ⓘBrandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK
2.4km (1.5 miles) ⓘIngray Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.5km (1.6 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
2.7km (1.7 miles) ⓘOld Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.7km (1.7 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
3.1km (1.9 miles) ⓘOld Sandbed Mine, Caldbeck, Allerdale, Cumbria, England, UK
3.1km (1.9 miles) ⓘDumpy Stone Level, Caldbeck, Allerdale, Cumbria, England, UK
3.3km (2.1 miles) ⓘNether Row Brow, Caldbeck, Allerdale, Cumbria, England, UK
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.
Kingsbury, Arthur W.G., Hartley, J. (1957) Beaverite from the Lake District. Mineralogical Magazine and Journal of the Mineralogical Society, 31 (239). 700-702 doi:10.1180/minmag.1957.31.239.10
Hartley, J. (1984) A list of minerals associated with the ore deposits of the Caldbeck Fells, Cumbria. Transactions of the Leeds Geological Association, 10 (3) 22-39
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
Bridges, Trevor F., Green, David, Rumsey, Michael S., Leppington, C. Michael (2011) A review of the mineralisation of the Roughton Gill mines, Caldbeck Fells, Cumbria: Part 3 Roughton Gill Mine. Journal of the Russell Society, 14. 3-23
 
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