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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Arsenopyrite from
New Brancepeth Colliery (Sleetburn Colliery), Deerness Valley, Brandon and Byshottles, County Durham, England, UK


Locality type:Colliery
Classification
Species:Arsenopyrite
Formula:FeAsS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arsenopyrite data
Locality Data:Click here to view New Brancepeth Colliery (Sleetburn Colliery), Deerness Valley, Brandon and Byshottles, County Durham, England, UK
Data Identifiers
Mindat Occurrence Record ID:148787
Long-form Identifier:1:3:148787:9
GUID (UUID V4):0
Nearest other occurrences of Arsenopyrite
31.8km (19.8 miles) ⓘBillingham anhydrite mine, Billingham, Stockton-on-Tees, North Yorkshire, England, UK
49.9km (31.0 miles) ⓘLong Grain Trial, Alston Moor, Eden, Cumbria, England, UK
74.3km (46.2 miles) ⓘShap Pink Quarry, Shap Rural, Eden, Cumbria, England, UK
75.3km (46.8 miles) ⓘSherry Gill, Shap Rural, Eden, Cumbria, England, UK
77.2km (48.0 miles) ⓘBuns Mine (Burnbank Mine), Bampton, Eden, Cumbria, England, UK
89.4km (55.5 miles) ⓘOld Sandbed Mine, Caldbeck, Allerdale, Cumbria, England, UK
89.5km (55.6 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
89.6km (55.7 miles) ⓘDumpy Stone Level, Caldbeck, Allerdale, Cumbria, England, UK
89.9km (55.9 miles) ⓘNether Row Brow, Caldbeck, Allerdale, Cumbria, England, UK
90.1km (56.0 miles) ⓘGrains Gill, Mungrisdale, Eden, Cumbria, England, UK
References
Dunham, K.C. (1990) Geology of the Northern Pennine Orefield, Volume 1, Tyne to Stainmore. 2nd edition, British Geological Survey.pp.276-278
 
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