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
Beinn Fhada, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK


Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Beinn Fhada, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:708553
Long-form Identifier:1:3:708553:6
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
0.9km (0.6 miles) ⓘFaire Donn, Letterfearn, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
4.5km (2.8 miles) ⓘCreag Reidh Raineach, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
4.6km (2.8 miles) ⓘCoire Cuig haisginn, Dornie, Lochalsh, Wester Ross， Strathpeffer and Lochalsh, Highland, Scotland, UK
7.0km (4.4 miles) ⓘCorrary, Glen Beag, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
7.6km (4.8 miles) ⓘSron an Fheadain, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
8.7km (5.4 miles) ⓘAllt Ease Mhor Chuil an Duin, Glenelg, Wester Ross, Strathpeffer and Lochalsh, Highland, Scotland, UK
48.0km (29.8 miles) ⓘGlen Loy, Loch Eil, Caol and Mallaig, Highland, Scotland, UK
References
Render, Paul (n.d.) Paul Render Collection.
 
and/or  
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