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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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Autunite from
South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK


06459360017271997879496.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
06399490017272073062358.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
00932220017272073072660.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
06596910017272073073075.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
06459360017271997879496.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
03254830017370835846435.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
05819380017370835847759.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
08681730017370835847792.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
06459360017271997879496.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
06399490017272073062358.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
00932220017272073072660.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
06596910017272073073075.jpg
Autunite

South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
Locality type:Mine
Classification
Species:Autunite
Formula:Ca(UO2)2(PO4)2 · 10-12H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Autunite data
Locality Data:Click here to view South Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
Photo GalleryView Gallery (5 photos)
Data Identifiers
Mindat Occurrence Record ID:209334
Long-form Identifier:1:3:209334:5
GUID (UUID V4):0
Nearest other occurrences of Autunite
0.4km (0.3 miles) ⓘWheal Basset, Basset Mines, Carnkie, Carn Brea, Cornwall, England, UK
0.7km (0.5 miles) ⓘWest Basset Stamps (Wheal Haste), Basset Mines, Carnkie, Carn Brea, Cornwall, England, UK
0.8km (0.5 miles) ⓘWheal Buller, Wheal Buller and Beauchamp, Redruth, Cornwall, England, UK
3.9km (2.5 miles) ⓘSouth Tolcarne Mine, Beacon, Camborne, Cornwall, England, UK
4.1km (2.6 miles) ⓘWest Wheal Jewel (Tolcarne Mine; North Wheal Damsel), St Day, Cornwall, England, UK
4.9km (3.0 miles) ⓘCarharrack Mine, Gwennap, Cornwall, England, UK
7.3km (4.6 miles) ⓘChywoon Quarry, Mabe, Cornwall, England, UK
27.1km (16.8 miles) ⓘSouth Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK
29.1km (18.1 miles) ⓘWheal Remfry China Clay Pit, Fraddon, St Enoder, Cornwall, England, UK
31.0km (19.2 miles) ⓘStenna Gwyn Mine (Stennagwyn Mine), Foxhole, St Stephen-in-Brannel, Cornwall, England, UK
References
Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford.
Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.
 
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