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
Black Crag, Above Derwent, Allerdale, Cumbria, England, UK


Classification
Species:Arsenopyrite
Formula:FeAsS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arsenopyrite data
Locality Data:Click here to view Black Crag, Above Derwent, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:14629
Long-form Identifier:1:3:14629:6
GUID (UUID V4):0
Nearest other occurrences of Arsenopyrite
0.4km (0.3 miles) ⓘYewthwaite Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
0.7km (0.4 miles) ⓘManesty Vein, Grange, Borrowdale, Allerdale, Cumbria, England, UK
1.1km (0.7 miles) ⓘLittle Mine Crag, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
1.2km (0.7 miles) ⓘCopper Plate Mine, Borrowdale, Allerdale, Cumbria, England, UK
1.6km (1.0 miles) ⓘGoldscope Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
2.5km (1.5 miles) ⓘCastle Nook Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
2.9km (1.8 miles) ⓘDale Head Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
4.1km (2.5 miles) ⓘDale Head North, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
4.2km (2.6 miles) ⓘCobalt Mine, Scar Crag, Causey Pike, Above Derwent, Allerdale, Cumbria, England, UK
4.3km (2.7 miles) ⓘScar Crags, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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