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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Pyrrhotite from
Groverake Mine, Rookhope, Stanhope, County Durham, England, UK


Locality type:Mine
Classification
Species:Pyrrhotite
Formula:Fe1-xS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrrhotite data
Locality Data:Click here to view Groverake Mine, Rookhope, Stanhope, County Durham, England, UK
Data Identifiers
Mindat Occurrence Record ID:601093
Long-form Identifier:1:3:601093:5
GUID (UUID V4):0
Nearest other occurrences of Pyrrhotite
0.6km (0.4 miles) ⓘFrazer's Hush Mine, Rookhope, Stanhope, County Durham, England, UK
5.6km (3.5 miles) ⓘMiddlehope Burn, Westgate, Stanhope, County Durham, England, UK
6.0km (3.7 miles) ⓘWhiteheaps Mine, Hunstanworth, County Durham, England, UK
7.1km (4.4 miles) ⓘCambokeels Mine, Westgate, Stanhope, County Durham, England, UK
15.8km (9.8 miles) ⓘTynebottom Mine, Garrigill, Alston Moor, Eden, Cumbria, England, UK
16.4km (10.2 miles) ⓘCalvert Mine, Alston Moor, Eden, Cumbria, England, UK
22.8km (14.2 miles) ⓘSmittergill Head Mine, Ousby, Eden, Cumbria, England, UK
49.0km (30.5 miles) ⓘSherry Gill, Shap Rural, Eden, Cumbria, England, UK
57.0km (35.4 miles) ⓘOld Sandbed Mine, Caldbeck, Allerdale, Cumbria, England, UK
58.0km (36.0 miles) ⓘGrains Gill, Mungrisdale, Eden, Cumbria, England, UK
References
Mineralogical Magazine 1996 60 : 317-324
 
and/or  
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