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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Gyrolite from
'S Airde Beinn, Isle of Mull, Argyll and Bute, Scotland, UK


Classification
Species:Gyrolite
Formula:NaCa16Si23AlO60(OH)8 · 14H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gyrolite data
Locality Data:Click here to view 'S Airde Beinn, Isle of Mull, Argyll and Bute, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:605604
Long-form Identifier:1:3:605604:9
GUID (UUID V4):0
Nearest other occurrences of Gyrolite
14.1km (8.7 miles) ⓘLòn Reudle, Treshnish, Isle of Mull, Argyll and Bute, Scotland, UK
25.4km (15.8 miles) ⓘKilfinichen Bay, Loch Scridain area, Isle of Mull, Argyll and Bute, Scotland, UK
25.6km (15.9 miles) ⓘKilfinnichan, Isle of Mull, Argyll and Bute, Scotland, UK
77.5km (48.2 miles) ⓘTalisker Bay, Talisker, Carbost, Minginish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
89.4km (55.6 miles) ⓘPortree, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
90.1km (56.0 miles) ⓘStaffin Road, Portree, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
96.2km (59.8 miles) ⓘDunvegan Quarry, Dunvegan, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
97.6km (60.6 miles) ⓘMoonen Bay, Duirinish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
99.9km (62.1 miles) ⓘThe Storr, Staffin, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
References
Cann, J. R. (1965) The metamorphism of amygdales at 'S Airde Beinn, northern Mull. Mineralogical Magazine and Journal of the Mineralogical Society, 34 (268). 92-106 doi:10.1180/minmag.1965.034.268.08
Emeleus, C. H., Gyopari, M. C. (1992) Chapter 5: Isle of Mull. In British Tertiary Volcanic Province - Geological Conservation Review No. 4. Joint Nature Conservation Committee, Peterborough. p.143-184.
 
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