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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Tennantite Subgroup from
Trevascus Mine (Trevaskus Mine; Trevaskis Mine), Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK


Locality type:Mine
Classification
Species:'Tennantite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)As4S12S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tennantite Subgroup data
Locality Data:Click here to view Trevascus Mine (Trevaskus Mine; Trevaskis Mine), Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:10836
Long-form Identifier:1:3:10836:6
GUID (UUID V4):0
Nearest other occurrences of Tennantite Subgroup
1.3km (0.8 miles) ⓘNew West Rosewarne Mine (East Relistian Mine; Gwinear-Gwithian Consols), Relistian Mine (Relistien Mine; Relistian Consols), Reawla, Gwinear-Gwithian, Cornwall, England, UK
1.6km (1.0 miles) ⓘRelistian Mine (Relistien Mine; Relistian Consols), Reawla, Gwinear-Gwithian, Cornwall, England, UK
5.1km (3.1 miles) ⓘGreat Condurrow Mine, Beacon, Camborne, Cornwall, England, UK
5.4km (3.4 miles) ⓘNorth Roskear Mine, North Roskear, Camborne, Cornwall, England, UK
5.5km (3.4 miles) ⓘGrenville United Mines, Troon, Camborne, Cornwall, England, UK
5.5km (3.4 miles) ⓘDolcoath Mine, Camborne, Cornwall, England, UK
6.0km (3.7 miles) ⓘCook's Kitchen Mine, Pool, Carn Brea, Cornwall, England, UK
6.3km (3.9 miles) ⓘTincroft Mine, Pool, Carn Brea, Cornwall, England, UK
7.2km (4.5 miles) ⓘCarn Brea Mine, Pool, Carn Brea, Cornwall, England, UK
7.2km (4.5 miles) ⓘBasset Mines, Carnkie, Carn Brea, Cornwall, England, UK
References
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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