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
Herodsfoot Mine (North Herodsfoot Mine), Lanreath, Cornwall, England, UK


07867960017271969455006.jpg
Tetrahedrite Subgroup, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
00143000017271997617508.jpg
Tetrahedrite Subgroup, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
00763010017271997622363.jpg
Tetrahedrite Subgroup

Herodsfoot Mine, Lanreath, Cornwall, England, UK
04442340017271997632102.jpg
Tetrahedrite Subgroup

Herodsfoot Mine, Lanreath, Cornwall, England, UK
06955880017365730905582.jpg
Tetrahedrite Subgroup, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
00143000017271997617508.jpg
Tetrahedrite Subgroup, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
00763010017271997622363.jpg
Tetrahedrite Subgroup

Herodsfoot Mine, Lanreath, Cornwall, England, UK
04442340017271997632102.jpg
Tetrahedrite Subgroup

Herodsfoot Mine, Lanreath, Cornwall, England, UK
07867960017271969455006.jpg
Tetrahedrite Subgroup, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
00143000017271997617508.jpg
Tetrahedrite Subgroup, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
00763010017271997622363.jpg
Tetrahedrite Subgroup

Herodsfoot Mine, Lanreath, Cornwall, England, UK
08126790017365730906595.jpg
Tetrahedrite Subgroup

Herodsfoot Mine, Lanreath, Cornwall, England, UK
Locality type:Mine
Classification
Species:'Tetrahedrite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)Sb4S12S
Habit:Tetrahedrons to 2cm
Colour:coated with chalcopyrite
Quality for species:Excellent - world class for species or very significant. (!!)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Chalcopyrite79
Galena52
Quartz46
Siderite15
Calcite1
Pyrite1
Data
Mineral Data:Click here to view Tetrahedrite Subgroup data
Locality Data:Click here to view Herodsfoot Mine (North Herodsfoot Mine), Lanreath, Cornwall, England, UK
Photo GalleryView Gallery (36 photos)
Data Identifiers
Mindat Occurrence Record ID:10950
Long-form Identifier:1:3:10950:5
GUID (UUID V4):0
Nearest other occurrences of Tetrahedrite Subgroup
8.9km (5.5 miles) ⓘSilver Vein Mine (Beacon Hill Mine; Wheal Fortescue), Lostwithiel, Cornwall, England, UK
9.1km (5.7 miles) ⓘWheal Cicely (Wheal Sicily), St Neot, Cornwall, England, UK
16.5km (10.2 miles) ⓘEast Crinnis Mine (incl. Wheal Rowe), South Par Mine, St Blaise, Cornwall, England, UK
17.7km (11.0 miles) ⓘCrinnis Mine (Great Crinnis Mine; Carlyon Consolidated Mine), Carlyon Bay, Carlyon, Cornwall, England, UK
23.4km (14.5 miles) ⓘLockridge Mine (Goldstreet Mine), East Tamar Consols, Bere Alston Mines, Bere Ferrers, West Devon, Devon, England, UK
24.1km (14.9 miles) ⓘGunnislake Clitters Mine, Clitters United Mines, Gunnislake, Calstock, Cornwall, England, UK
24.8km (15.4 miles) ⓘTrelill Quarry, St Kew, Cornwall, England, UK
25.0km (15.5 miles) ⓘPengenna Mine, St Kew, Cornwall, England, UK
25.5km (15.9 miles) ⓘGreystone Quarry, Lezant, Cornwall, England, UK
28.5km (17.7 miles) ⓘBounds Cliff, St Endellion, 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.
Starkey, Roy (2012) The Herodsfoot mine, Lanreath, Cornwall, England. The Mineralogical Record, 43 (4) 411-486
 
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