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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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Tennantite Subgroup from
Wheal Jewel, Gwennap, Cornwall, England, UK


06639620017362754542134.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
06171230017271997425701.jpg
Tennantite Subgroup, etc.

Wheal Jewel, Gwennap, Cornwall, England, UK
09103110017271997439573.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
00602150017366358141385.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
06639620017362754542134.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
06171230017271997425701.jpg
Tennantite Subgroup, etc.

Wheal Jewel, Gwennap, Cornwall, England, UK
09103110017271997439573.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
00602150017366358141385.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
02788020017366358146432.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
06171230017271997425701.jpg
Tennantite Subgroup, etc.

Wheal Jewel, Gwennap, Cornwall, England, UK
03113400017271997482014.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
04798740017366358149686.jpg
Tennantite Subgroup

Wheal Jewel, Gwennap, Cornwall, England, UK
Locality type:Mine
Classification
Species:'Tennantite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)As4S12S
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Bornite3
Chalcopyrite2
- var Blistered Copper1
Quartz1
Data
Mineral Data:Click here to view Tennantite Subgroup data
Locality Data:Click here to view Wheal Jewel, Gwennap, Cornwall, England, UK
Photo GalleryView Gallery (5 photos)
Data Identifiers
Mindat Occurrence Record ID:10849
Long-form Identifier:1:3:10849:0
GUID (UUID V4):0
Nearest other occurrences of Tennantite Subgroup
0.2km (0.1 miles) ⓘCarharrack Mine, Gwennap, Cornwall, England, UK
0.8km (0.5 miles) ⓘWest Wheal Jewel (Tolcarne Mine; North Wheal Damsel), St Day, Cornwall, England, UK
0.9km (0.6 miles) ⓘWheal Unity, Gwennap, Cornwall, England, UK
0.9km (0.6 miles) ⓘWheal Virgin, Great Consolidated Mines, Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
0.9km (0.6 miles) ⓘWheal Gorland, St Day, Cornwall, England, UK
1.4km (0.9 miles) ⓘUnited Mines (Gwennap United Mines), Clifford Amalgamated Mines, Gwennap, Cornwall, England, UK
3.1km (1.9 miles) ⓘTresavean Mine, Lanner, Lanner, Cornwall, England, UK
3.7km (2.3 miles) ⓘWheal Jane, Kea, Cornwall, England, UK
4.8km (3.0 miles) ⓘSouth Wheal Basset, Carnkie, Carn Brea, Cornwall, England, UK
5.3km (3.3 miles) ⓘWheal Druid, Carn Brea Mine, Pool, Carn Brea, Cornwall, England, UK
References
Phillips, William (1823) An Elementary Introduction to Mineralogy (3rd ed.)
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.
Hill, J. B., MacAlister, D. A. (1906) The Geology of Falmouth and Truro and of the Mining District of Camborne and Redruth - Memoirs of the Geological Survey. Geological Survey of Great Britain.
 
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