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
Birk Fell Mine, Coniston, South Lakeland, Cumbria, 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 Birk Fell Mine, Coniston, South Lakeland, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:17876
Long-form Identifier:1:3:17876:3
GUID (UUID V4):0
Nearest other occurrences of Tennantite Subgroup
0.4km (0.3 miles) ⓘPave York Mine, Greenburn Valley, Coniston, South Lakeland, Cumbria, England, UK
2.9km (1.8 miles) ⓘPaddy End Mine, Coniston, South Lakeland, Cumbria, England, UK
13.9km (8.7 miles) ⓘHolehouse Gill Mine, Ulpha, Copeland, Cumbria, England, UK
14.2km (8.8 miles) ⓘEagle Crag Mine, Patterdale, Eden, Cumbria, England, UK
16.3km (10.1 miles) ⓘDale Head Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
32.3km (20.1 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
33.9km (21.1 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
35.0km (21.8 miles) ⓘOld Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
44.1km (27.4 miles) ⓘClouds Veins, Ravenstonedale, Eden, Cumbria, England, UK
50.8km (31.6 miles) ⓘHigh Longrigg Mine, Hartley, Eden, Cumbria, England, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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