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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Tetrahedrite Subgroup from
The Gannel Smelter slag locality, Crantock, Cornwall, England, UK


Locality type:Slag Locality
Classification
Species:'Tetrahedrite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)Sb4S12S
Formation:Post-mining/Anthropogenic
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tetrahedrite Subgroup data
Locality Data:Click here to view The Gannel Smelter slag locality, Crantock, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:693248
Long-form Identifier:1:3:693248:0
GUID (UUID V4):0
Nearest other occurrences of Tetrahedrite Subgroup
9.7km (6.1 miles) ⓘCarnewas Mine, St Eval, Cornwall, England, UK
16.8km (10.4 miles) ⓘTrenance, St Issey, Cornwall, England, UK
18.9km (11.7 miles) ⓘSouthern Merop Island, Gunver Head, Padstow, Cornwall, England, UK
18.9km (11.7 miles) ⓘPoldice Mine, St Day United Mines (Poldice Mines), Gwennap, Cornwall, England, UK
19.0km (11.8 miles) ⓘCuddrabridge Mine (Guddrabridge Mine; Padstow Consols; Trevone Consols; Wheal Galway), Gunver Head, Padstow, Cornwall, England, UK
27.6km (17.2 miles) ⓘCrinnis Mine (Great Crinnis Mine; Carlyon Consolidated Mine), Carlyon Bay, Carlyon, Cornwall, England, UK
28.4km (17.6 miles) ⓘEast Crinnis Mine (incl. Wheal Rowe), South Par Mine, St Blaise, Cornwall, England, UK
29.3km (18.2 miles) ⓘTrevascus Mine (Trevaskus Mine; Trevaskis Mine), Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK
29.5km (18.3 miles) ⓘTresungers Point (incl. Tartar Cove), St Endellion, Cornwall, England, UK
29.8km (18.5 miles) ⓘTrelill Quarry, St Kew, Cornwall, England, UK
References
BMS Newsletter 79, March 2010 (http://britishmicromountsociety.homestead.com/Gannell-Smelter.html)
 
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