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
Sgurr Aoidhe, Loch Duich, 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 Sgurr Aoidhe, Loch Duich, Highland, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:708289
Long-form Identifier:1:3:708289:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.8km (0.5 miles) ⓘAn Leth Alt, Loch Duich, Highland, Scotland, UK
1.7km (1.1 miles) ⓘCreag Reidh Raineach, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
1.7km (1.1 miles) ⓘCarr Brae, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
2.0km (1.2 miles) ⓘTorr a Char, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
2.5km (1.5 miles) ⓘDun Mor, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
3.0km (1.9 miles) ⓘEilean Donnan Castle, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
6.5km (4.0 miles) ⓘGleann Udalain, Auchtertyre, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
6.6km (4.1 miles) ⓘAvernish, Auchtertyre, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
7.3km (4.5 miles) ⓘAuchtertyre, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
11.8km (7.3 miles) ⓘAllt an Fhaing, Glen Beag, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
References
Render, Paul (n.d.) Paul Render Collection.
 
and/or  
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