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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Muscovite from
Brundholme Mine (Glenderaterra Mine; Blencathra Mine), Glenderaterra Valley, Threlkeld, Eden, Cumbria, England, UK


Locality type:Mine
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Brundholme Mine (Glenderaterra Mine; Blencathra Mine), Glenderaterra Valley, Threlkeld, Eden, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:985305
Long-form Identifier:1:3:985305:8
GUID (UUID V4):0
Nearest other occurrences of Muscovite
3.1km (1.9 miles) ⓘThrelkeld Mine, Threlkeld, Threlkeld, Eden, Cumbria, England, UK
4.7km (2.9 miles) ⓘBannerdale Graphite Mine, Bannerdale, Mungrisdale, Eden, Cumbria, England, UK
6.4km (3.9 miles) ⓘGrains Gill, Mungrisdale, Eden, Cumbria, England, UK
6.5km (4.0 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
7.2km (4.4 miles) ⓘBrandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK
7.3km (4.5 miles) ⓘThornthwaite Mine, Thornthwaite, Above Derwent, Allerdale, Cumbria, England, UK
7.3km (4.5 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
7.3km (4.5 miles) ⓘRoughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
8.8km (5.5 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
9.4km (5.8 miles) ⓘOld Sandbed Mine, Caldbeck, Allerdale, Cumbria, England, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
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