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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Heulandite Subgroup from
The Storr, Staffin, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK


Locality type:Cliff
Classification
Species:'Heulandite Subgroup' (not an IMA approved species)
Formula:(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Heulandite Subgroup data
Locality Data:Click here to view The Storr, Staffin, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:19014
Long-form Identifier:1:3:19014:5
GUID (UUID V4):0
Nearest other occurrences of Heulandite Subgroup
15.8km (9.8 miles) ⓘQuiraing, Staffin, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
16.6km (10.3 miles) ⓘA850 road cut, Blackhill, Edinbane, Waternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
27.6km (17.2 miles) ⓘEas a Bradain, Luib, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
28.9km (18.0 miles) ⓘPreshal More, Carbost, Minginish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
35.0km (21.7 miles) ⓘMoonen Bay, Duirinish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
35.6km (22.1 miles) ⓘSgurr nam Boc, Glen Brittle, Minginish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
35.9km (22.3 miles) ⓘMarble quarries, Kilchrist, Broadford, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
93.9km (58.3 miles) ⓘWhitesmith Mine, Strontian, Fort William and Ardnamurchan, Highland, Scotland, UK
98.6km (61.2 miles) ⓘTobermory, Isle of Mull, Argyll and Bute, Scotland, UK
99.9km (62.1 miles) ⓘ'S Airde Beinn, Isle of Mull, Argyll and Bute, Scotland, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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