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
Sale Fell Minette, Wythop, Allerdale, Cumbria, England, UK


Locality type:Outcrop
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 Sale Fell Minette, Wythop, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:14990
Long-form Identifier:1:3:14990:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
13.9km (8.7 miles) ⓘCarrock Mine, Mungrisdale, Eden, Cumbria, England, UK
14.1km (8.7 miles) ⓘBrandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK
14.9km (9.2 miles) ⓘBannerdale Graphite Mine, Bannerdale, Mungrisdale, Eden, Cumbria, England, UK
17.5km (10.9 miles) ⓘWad Mine, Seathwaite, Borrowdale, Allerdale, Cumbria, England, UK
27.8km (17.3 miles) ⓘMecklin Wood, Wasdale, Copeland, Cumbria, England, UK
42.5km (26.4 miles) ⓘShap Pink Quarry, Shap Rural, Eden, Cumbria, England, UK
49.7km (30.9 miles) ⓘGrassgarth Height, Haverthwaite, South Lakeland, Cumbria, England, UK
88.4km (55.0 miles) ⓘBail Hill, Sanquhar, Dumfries and Galloway, Scotland, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
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