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
Langhorn Quarry, Bigrigg, Egremont, Copeland, Cumbria, England, UK


Locality type:Quarry
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 Langhorn Quarry, Bigrigg, Egremont, Copeland, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:17003
Long-form Identifier:1:3:17003:5
GUID (UUID V4):0
Nearest other occurrences of Muscovite
3.8km (2.4 miles) ⓘOverend Quarry, Whitehaven, Copeland, Cumbria, England, UK
21.5km (13.4 miles) ⓘForce Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
22.7km (14.1 miles) ⓘDale Head Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
22.7km (14.1 miles) ⓘCastle Nook Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
22.8km (14.2 miles) ⓘWad Mine, Seathwaite, Borrowdale, Allerdale, Cumbria, England, UK
23.1km (14.4 miles) ⓘGoldscope Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
24.7km (15.3 miles) ⓘYewthwaite Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
25.6km (15.9 miles) ⓘThornthwaite Mine, Thornthwaite, Above Derwent, Allerdale, Cumbria, England, UK
31.5km (19.6 miles) ⓘConiston Copper Mines, Coniston, South Lakeland, Cumbria, England, UK
32.5km (20.2 miles) ⓘBrundholme Mine (Glenderaterra Mine; Blencathra Mine), Glenderaterra Valley, Threlkeld, Eden, Cumbria, England, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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