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
Mhuineil, Barrisdale Bay, Loch Hourn Complex, Highland, Scotland, UK


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:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Mhuineil, Barrisdale Bay, Loch Hourn Complex, Highland, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:708191
Long-form Identifier:1:3:708191:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
6.1km (3.8 miles) ⓘCaolas Eilean Rarsaidh, Loch Hourn Complex, Highland, Scotland, UK
8.9km (5.6 miles) ⓘMeall Buidhe, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
10.9km (6.8 miles) ⓘAllt an Fhaing, Glen Beag, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
17.6km (10.9 miles) ⓘGlen Dessary syenite intrusion, Caol and Mallaig, Highland, Scotland, UK
18.5km (11.5 miles) ⓘAn Leth Alt, Loch Duich, Highland, Scotland, UK
19.0km (11.8 miles) ⓘSgurr Aoidhe, Loch Duich, Highland, Scotland, UK
19.4km (12.1 miles) ⓘCarr Brae, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
19.6km (12.2 miles) ⓘTorr a Char, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
19.8km (12.3 miles) ⓘAvernish, Auchtertyre, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
19.9km (12.4 miles) ⓘEilean Donnan Castle, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
References
Render, Paul (n.d.) Paul Render Collection.
 
and/or  
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