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


Locality type:Mine
Classification
Species:Plumbojarosite
Formula:Pb0.5Fe33+(SO4)2(OH)6
Comments:Kingsbury reference.

Bridges et al. (2011) [on 'beaverite']: "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 Plumbojarosite data
Locality Data:Click here to view Roughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:17165
Long-form Identifier:1:3:17165:4
GUID (UUID V4):0
Nearest other occurrences of Plumbojarosite
0.4km (0.2 miles) ⓘIron Crag, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.6km (0.4 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.8km (1.1 miles) ⓘShort Grain, Deer Hills, Caldbeck, Allerdale, Cumbria, England, UK
2.1km (1.3 miles) ⓘBrandy Gill Mine, Mungrisdale, Eden, 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
3.3km (2.1 miles) ⓘNether Row Brow, Caldbeck, Allerdale, Cumbria, England, UK
5.9km (3.7 miles) ⓘSaddleback upper trial, Mungrisdale, Eden, Cumbria, England, UK
12.0km (7.5 miles) ⓘWanthwaite Mine, St. John's Castlerigg and Wythburn, Allerdale, Cumbria, England, UK
98.3km (61.1 miles) ⓘTurf Pits Mine (West Turf Pits Mine), Grassington Moor, Grassington, Craven, North Yorkshire, England, UK
References
Kingsbury, Arthur W. G., Hartley, J. (1960) Carminite and beudantite from the northern part of the Lake District and from Cornwall. Mineralogical Magazine and Journal of the Mineralogical Society, 32 (249) 423-432 doi:10.1180/minmag.1960.032.249.01
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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