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
Burdell Gill, Coombe Height, Caldbeck, Allerdale, Cumbria, England, UK


Locality type:River
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Burdell Gill, Coombe Height, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:11183
Long-form Identifier:1:3:11183:8
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
1.4km (0.9 miles) ⓘCaldew Valley, Mungrisdale, Eden, Cumbria, England, UK
1.7km (1.1 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
1.8km (1.1 miles) ⓘGrains Gill, Mungrisdale, Eden, Cumbria, England, UK
2.1km (1.3 miles) ⓘPoddy Gill, Mungrisdale, Eden, Cumbria, England, UK
4.2km (2.6 miles) ⓘBannerdale Graphite Mine, Bannerdale, Mungrisdale, Eden, Cumbria, England, UK
4.5km (2.8 miles) ⓘSaddleback Old Mine, Mungrisdale, Eden, Cumbria, England, UK
8.3km (5.2 miles) ⓘThrelkeld Quarry, St. John's Castlerigg and Wythburn, Allerdale, Cumbria, England, UK
15.2km (9.4 miles) ⓘForce Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
15.4km (9.6 miles) ⓘScar Crags, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
15.4km (9.6 miles) ⓘCobalt Mine, Scar Crag, Causey Pike, Above Derwent, Allerdale, Cumbria, England, UK
References
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.
 
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