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
Hay Gill Copper Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Comments:Cooper & Stanley (1990): "Kingsbury (MS1) referred to calcite from Hay Gill in 'obtuse rhombohedra'; specimens in the Kingsbury Collection, BM(NH), show almost tabular crystals of this habit (< 15mm) and are labelled as from 'Deer Hills... at the top of Hay Gill'."

Bridges et al. (2011): "Calcite was found infilling cracks and cavities in ‘ankerite’ and quartz. Nailhead crystals up to 3 mm across have formed in some incompletely filled cavities. Two specimens in the Mike Leppington Collection show larger crystals which reach 10 mm across."
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Hay Gill Copper Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:2718
Long-form Identifier:1:3:2718:2
GUID (UUID V4):0
Nearest other occurrences of Calcite
0.6km (0.4 miles) ⓘDeer Hills, Caldbeck, Allerdale, Cumbria, England, UK
0.7km (0.4 miles) ⓘIngray Gill, Caldbeck, Allerdale, Cumbria, England, UK
0.8km (0.5 miles) ⓘDeer Hills Baryte Mine, Deer Hills, Caldbeck, Allerdale, Cumbria, England, UK
1.1km (0.7 miles) ⓘBrae Fell Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.2km (0.7 miles) ⓘOld Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.5km (0.9 miles) ⓘPotts Gill Copper Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.5km (0.9 miles) ⓘClints Gill (Roughton South Vein), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.7km (1.1 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.7km (1.1 miles) ⓘRoughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.8km (1.1 miles) ⓘIron Crag, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
References
Kingsbury, A.W.G. (MS1) (1953 or later) Investigation of the minerals of the Lake District, especially the Caldbeck area, in collaboration with J. Hartley. List of minerals found by us at many localities examined 1947-.
Hartley, J. (1984) A list of minerals associated with the ore deposits of the Caldbeck Fells, Cumbria. Transactions of the Leeds Geological Association, 10 (3) 22-39
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
Bridges, T.F., Rumsey, M.S., Leppington, C.M. (2011) A report on Hay Gill Mine, Caldbeck Fells, Cumbria. Journal of the Russell Society, 14. 62-68
 
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