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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Hydrocerussite from
Roughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK


Locality type:Mine
Classification
Species:Hydrocerussite
Formula:Pb3(CO3)2(OH)2
Comments:Cooper & Stanley (1990): "From the 30fm level dumps (Kingsbury & Hartley, MS); from the 60fm and 90fm level dumps (Hartley, 1984)."

Bridges et al. (2011): "Hartley (1984) notes the presence of hydrocerussite on specimen material collected by Kingsbury from all three levels, but no specimens could be found in Kingsbury’s collection in the NHM. It is very rare, but has been found on a few specimens from the 90 fathom dumps where it occurs as crusts of thin white plates, often with a near semi-circular shape, and with individual crystals up to 1.6 mm across, in cavities in quartz. One of the specimens of quartz examined contained a mass of white material 5 mm across with the appearance of cerussite, but with a distinct cleavage in places. It is probably a mass of hydrocerussite partly altered to cerussite."
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Hydrocerussite data
Locality Data:Click here to view Roughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:16489
Long-form Identifier:1:3:16489:4
GUID (UUID V4):0
Nearest other occurrences of Hydrocerussite
0.4km (0.3 miles) ⓘBalliway Rigg, Caldbeck, Allerdale, Cumbria, England, UK
0.4km (0.3 miles) ⓘSilver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.6km (0.4 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.8km (0.5 miles) ⓘRed Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.9km (0.5 miles) ⓘSwinburn Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.1km (0.7 miles) ⓘWet Smale Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.3km (0.8 miles) ⓘBrae Fell Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.8km (1.1 miles) ⓘShort Grain, Deer Hills, Caldbeck, Allerdale, Cumbria, England, UK
2.5km (1.6 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
2.7km (1.7 miles) ⓘDriggith Mine, 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.
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.
Stanley, Christopher J., Cooper, Michael P. (1991) Famous Mineral Localities: Pyromorphite-Group Minerals from the Caldbeck Fells, Cumbria, England. The Mineralogical Record, 22 (2) 105-121
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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