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


Locality type:Workings
Classification
Species:Pyrolusite
Formula:Mn4+O2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Arm O'Grain, Mungrisdale, Eden, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:9143
Long-form Identifier:1:3:9143:5
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
0.8km (0.5 miles) ⓘBrandy Gill Mine, 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
2.3km (1.4 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
3.2km (2.0 miles) ⓘOld Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
3.5km (2.2 miles) ⓘIngray Gill, Caldbeck, Allerdale, Cumbria, England, UK
15.2km (9.4 miles) ⓘBrandlehow Mine, Catbells, Borrowdale, Allerdale, Cumbria, England, UK
16.6km (10.3 miles) ⓘGreenside Mine, Patterdale, Eden, Cumbria, England, UK
References
Day, F. H. (1928) Some notes on the minerals of the Caldbeck Fells. Transactions of the Carlisle Natural History Society, 4. 66-79
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
 
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