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
Dolyhir Quarry, Old Radnor, Powys, Wales, UK


09602020017368817304894.jpg
Tennantite Subgroup, etc.

Dolyhir Quarry, Old Radnor, Powys, Wales, UK
09602020017368817304894.jpg
Tennantite Subgroup, etc.

Dolyhir Quarry, Old Radnor, Powys, Wales, UK
09381430017368817326870.jpg
Tennantite Subgroup, etc.

Dolyhir Quarry, Old Radnor, Powys, Wales, UK
Locality type:Quarry
Classification
Species:'Tennantite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)As4S12S
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Arsenopyrite1
Baryte1
Data
Mineral Data:Click here to view Tennantite Subgroup data
Locality Data:Click here to view Dolyhir Quarry, Old Radnor, Powys, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:20254
Long-form Identifier:1:3:20254:7
GUID (UUID V4):0
Nearest other occurrences of Tennantite Subgroup
83.1km (51.6 miles) ⓘCapel Hermon, Coed-y-Brenin deposit, Ganllwyd, Gwynedd, Wales, UK
85.9km (53.4 miles) ⓘCoed-y-Brenin deposit, Ganllwyd, Gwynedd, Wales, UK
88.0km (54.7 miles) ⓘClevedon Beach, Clevedon, North Somerset, England, UK
References
Wolfe, M. (2000) Mineral news. UK Journal of Mines and Minerals 20, 4-6
Cotterell, T. F.; Green, D. I.; Hubbard, N.; Mason, J. S.; Starkey, R. E.; Tindle, A. G. (2011) The Mineralogy of Dolyhir Quarry, Old Radnor, Powys, Wales. UK Journal of Mines and Minerals 32, p.5-61.
 
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