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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Beudantite from
Arm O'Grain, Mungrisdale, Eden, Cumbria, England, UK


Locality type:Workings
Classification
Species:Beudantite
Formula:PbFe33+(AsO4)(SO4)(OH)6
Comments:Cooper & Stanley (1990): "A small vein outcrop in this tributary of Grainsgill has yielded two different habits of the species (D.R. Middleton Collection) as small, dark brown, acute rhombohedra and as minute (0.3mm) pale brown, transparent, pseudo-cubic crystals with darker brown cores, at first mistaken for oxidized pharmacosiderite (det. BM(NH): XRD)."
Habit:acute rhombohedra; pseudocubic
Colour:pale to dark brown
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Data
Mineral Data:Click here to view Beudantite data
Locality Data:Click here to view Arm O'Grain, Mungrisdale, Eden, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:1931
Long-form Identifier:1:3:1931:6
GUID (UUID V4):0
Nearest other occurrences of Beudantite
0.8km (0.5 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
0.8km (0.5 miles) ⓘBrandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK
0.9km (0.6 miles) ⓘGrains Gill, Mungrisdale, Eden, Cumbria, England, UK
1.3km (0.8 miles) ⓘBurdell Gill, Coombe Height, Caldbeck, Allerdale, Cumbria, England, UK
1.4km (0.9 miles) ⓘDry Gill Mine, Caldbeck, Allerdale, Cumbria, England, UK
1.6km (1.0 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.6km (1.0 miles) ⓘThief Gills, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.8km (1.1 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.9km (1.2 miles) ⓘSilver Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.3km (1.4 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
References
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
 
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