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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Corundum from
Seabank Villa, Loch Scridain area, Isle of Mull, Argyll and Bute, Scotland, UK


03949810017364139787975.jpg
Sapphire

Seabank Villa, Loch Scridain area, Isle of Mull, Argyll and Bute, Scotland, UK
03949810017364139787975.jpg
Sapphire

Seabank Villa, Loch Scridain area, Isle of Mull, Argyll and Bute, Scotland, UK
05917060017272007885580.jpg
Sapphire

Seabank Villa, Loch Scridain area, Isle of Mull, Argyll and Bute, Scotland, UK
Locality type:Sill
Classification
Species:Corundum
Formula:Al2O3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Corundum data
Locality Data:Click here to view Seabank Villa, Loch Scridain area, Isle of Mull, Argyll and Bute, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:1010367
Long-form Identifier:1:3:1010367:0
GUID (UUID V4):0
Nearest other occurrences of Corundum
2.8km (1.7 miles) ⓘPennycross sapphire occurrence (Sgeir an Fhèidh to Crois an Ollaimb), Loch Scridain area, Isle of Mull, Argyll and Bute, Scotland, UK
3.9km (2.4 miles) ⓘLoch Scridain (north of), Loch Scridain area, Isle of Mull, Argyll and Bute, Scotland, UK
5.3km (3.3 miles) ⓘRoadside dyke, Bunessan, Isle of Mull, Argyll and Bute, Scotland, UK
8.3km (5.2 miles) ⓘCarsaig Bay, Carsaig, Isle of Mull, Argyll and Bute, Scotland, UK
9.6km (6.0 miles) ⓘSouth coast, Isle of Mull, Argyll and Bute, Scotland, UK
36.3km (22.5 miles) ⓘGlebe Hill, Kilchoan, Ardnamurchan, Fort William and Ardnamurchan, Highland, Scotland, UK
37.1km (23.0 miles) ⓘMeall Chro Bheinn, Kilchoan, Ardnamurchan, Fort William and Ardnamurchan, Highland, Scotland, UK
65.1km (40.5 miles) ⓘAllt Guibhsachain, Ballachulish, Fort William and Ardnamurchan, Highland, Scotland, UK
66.0km (41.0 miles) ⓘSithean Sluaigh, Argyll and Bute, Scotland, UK
References
Bowen, N.L., Greig, J.W., Zies, E.G. (1924) Mullite, a silicate of alumina. Journal of the Washington Academy of Sciences: 14: 183-191.
 
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