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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Biotite from
Wad Mine, Seathwaite, Borrowdale, Allerdale, Cumbria, England, UK


Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Wad Mine, Seathwaite, Borrowdale, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:14985
Long-form Identifier:1:3:14985:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
15.1km (9.4 miles) ⓘMecklin Wood, Wasdale, Copeland, Cumbria, England, UK
17.5km (10.9 miles) ⓘSale Fell Minette, Wythop, Allerdale, Cumbria, England, UK
20.0km (12.4 miles) ⓘBannerdale Graphite Mine, Bannerdale, Mungrisdale, Eden, Cumbria, England, UK
22.5km (14.0 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
23.2km (14.4 miles) ⓘBrandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK
32.3km (20.1 miles) ⓘGrassgarth Height, Haverthwaite, South Lakeland, Cumbria, England, UK
32.8km (20.4 miles) ⓘShap Pink Quarry, Shap Rural, Eden, Cumbria, England, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
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