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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Calcite from
Speedwell Mine (Oakden Level), Castleton, High Peak, Derbyshire, England, UK


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Speedwell Mine (Oakden Level), Castleton, High Peak, Derbyshire, England, UK
Data Identifiers
Mindat Occurrence Record ID:629683
Long-form Identifier:1:3:629683:4
GUID (UUID V4):0
Nearest other occurrences of Calcite
0.4km (0.2 miles) ⓘShackhole Scrin, Castleton, High Peak, Derbyshire, England, UK
0.4km (0.2 miles) ⓘSlate Scrin Mine, Castleton, High Peak, Derbyshire, England, UK
0.4km (0.3 miles) ⓘOld Tor Mine, Castleton, High Peak, Derbyshire, England, UK
0.4km (0.3 miles) ⓘCowlow Nick, Castleton, High Peak, Derbyshire, England, UK
0.6km (0.3 miles) ⓘTreak Cliff Cavern (Treak Cliff Mine), Castleton, High Peak, Derbyshire, England, UK
0.8km (0.5 miles) ⓘWall Shaft Mine, Castleton, High Peak, Derbyshire, England, UK
0.9km (0.5 miles) ⓘPeakshole Sough, Castleton, High Peak, Derbyshire, England, UK
1.0km (0.6 miles) ⓘOdin Mine, Castleton, High Peak, Derbyshire, England, UK
1.3km (0.8 miles) ⓘHow Grove (incl. Nall Grove), Dirtlow Rake, Castleton, High Peak, Derbyshire, England, UK
1.3km (0.8 miles) ⓘLaporte Minerals openpit, Dirtlow Rake, Castleton, High Peak, Derbyshire, England, UK
References
Rieuwerts, J.H., and Ford, T.D. (1985): Bulletin of the Peak District Mines Historical Society 9(3), 129-170
Ford, T., Sarjeant, A., Smith, M. (1993) The minerals of the Peak district of Derbyshire. UK Journal of Mines and Minerals 13, Rockbottom Publications. 16-55
 
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