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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Sillimanite from
Glen Loy, Loch Eil, Caol and Mallaig, Highland, Scotland, UK


Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Glen Loy, Loch Eil, Caol and Mallaig, Highland, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:17652
Long-form Identifier:1:3:17652:5
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
44.0km (27.4 miles) ⓘSron an Fheadain, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
44.1km (27.4 miles) ⓘCorrary, Glen Beag, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
44.1km (27.4 miles) ⓘAllt Ease Mhor Chuil an Duin, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
47.6km (29.5 miles) ⓘCreag Reidh Raineach, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
47.7km (29.7 miles) ⓘCoire Cuig haisginn, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
48.0km (29.8 miles) ⓘBeinn Fhada, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
48.3km (30.0 miles) ⓘFaire Donn, Letterfearn, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
97.3km (60.5 miles) ⓘBendoran Cottage, Bunessan, Isle of Mull, Argyll and Bute, Scotland, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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