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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Tourmaline from
Poddy Gill, Mungrisdale, Eden, Cumbria, England, UK


Locality type:River
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Comments:Cooper and Stanley (1990): "Bundles of black crystals in a N-S quartz vein about half-way up the gill (Hitchen, 1934; Davidson & Thomson, 1951)."
Colour:black
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Poddy Gill, Mungrisdale, Eden, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:17980
Long-form Identifier:1:3:17980:5
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
0.4km (0.2 miles) ⓘGrains Gill, Mungrisdale, Eden, Cumbria, England, UK
0.5km (0.3 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
0.9km (0.6 miles) ⓘCaldew Valley, Mungrisdale, Eden, Cumbria, England, UK
2.1km (1.3 miles) ⓘBurdell Gill, Coombe Height, Caldbeck, Allerdale, Cumbria, England, UK
3.5km (2.2 miles) ⓘBannerdale Graphite Mine, Bannerdale, Mungrisdale, Eden, Cumbria, England, UK
4.2km (2.6 miles) ⓘSaddleback Old Mine, Mungrisdale, Eden, Cumbria, England, UK
8.5km (5.3 miles) ⓘThrelkeld Quarry, St. John's Castlerigg and Wythburn, Allerdale, Cumbria, England, UK
17.0km (10.5 miles) ⓘForce Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
17.1km (10.6 miles) ⓘScar Crags, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
17.2km (10.7 miles) ⓘCobalt Mine, Scar Crag, Causey Pike, Above Derwent, Allerdale, Cumbria, England, UK
References
Stansfield Kitchen, C. (1934) The Skiddaw Granite and its Residual Products. Journal of the Geological Society, 90 (1) 158-200 doi:10.1144/gsl.jgs.1934.090.01-04.07
Davidson, W.F. and Thomson, N. (1951) Some notes on the minerals of Westmorland and Cumberland. North West Naturalist, 23 (for 1948), 136-154.
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
 
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