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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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Garronite-Ca from
The Storr, Staffin, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK


04219580017430055156173.jpg
Garronite-Ca, etc.

The Storr, Staffin, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
04219580017430055156173.jpg
Garronite-Ca, etc.

The Storr, Staffin, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
04159160017430055161079.jpg
Garronite-Ca, etc.

The Storr, Staffin, Trotternish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
Locality type:Cliff
Classification
Species:Garronite-Ca
Formula:Na2Ca5Al12Si20O64 · 27H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Lévyne1
Data
Mineral Data:Click here to view Garronite-Ca 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:5541
Long-form Identifier:1:3:5541:3
GUID (UUID V4):0
Nearest other occurrences of Garronite-Ca
35.0km (21.7 miles) ⓘMoonen Bay, Duirinish, Isle of Skye, Eilean á Chèo, Highland, Scotland, UK
References
[Specimen in the Natural History Museum, London]
 
and/or  
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