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
Carnan Cruithneachd, Glen Elchaig, Wester Ross， Strathpeffer and Lochalsh, 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 Carnan Cruithneachd, Glen Elchaig, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:708449
Long-form Identifier:1:3:708449:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
10.1km (6.3 miles) ⓘGold and Copper trial, Carr Brae, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
32.9km (20.5 miles) ⓘAllt Guibhsachain, Ballachulish, Fort William and Ardnamurchan, Highland, Scotland, UK
37.3km (23.2 miles) ⓘSron Gharbh (Sron Garbh), Fort William and Ardnamurchan, Highland, Scotland, UK
65.9km (40.9 miles) ⓘReasagbuie dike, Colonsay dikes, Isle of Colonsay, Argyll and Bute, Scotland, UK
67.2km (41.8 miles) ⓘMuirshiel Mine, Renfrewshire, Scotland, UK
67.3km (41.8 miles) ⓘGlen Dessary syenite intrusion, Caol and Mallaig, Highland, Scotland, UK
68.7km (42.7 miles) ⓘLower Kilchattan dike, Colonsay dikes, Isle of Colonsay, Argyll and Bute, Scotland, UK
77.1km (47.9 miles) ⓘComrie contact aureole, Comrie, Perth and Kinross, Scotland, UK
81.9km (50.9 miles) ⓘMhuineil, Barrisdale Bay, Loch Hourn Complex, Highland, Scotland, UK
86.5km (53.7 miles) ⓘFoss West Mine, Aberfeldy, Perth and Kinross, Scotland, UK
References
Render, Paul (n.d.) Paul Render Collection.
 
and/or  
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