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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Marcasite from
Vaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK


07794440017272036329549.jpg
Marcasite, etc.

Vaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK
07794440017272036329549.jpg
Marcasite, etc.

Vaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK
07794440017272036329549.jpg
Marcasite, etc.

Vaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK
Locality type:Quarry
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Calcite1
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Vaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:67775
Long-form Identifier:1:3:67775:0
GUID (UUID V4):0
Nearest other occurrences of Marcasite
16.6km (10.3 miles) ⓘParc Colliery (Park), Cwmparc, Rhondda Cynon Taf, Wales, UK
20.1km (12.5 miles) ⓘBig Pit (Colliery), Blaenavon, Torfaen, Wales, UK
21.3km (13.2 miles) ⓘWyllie Colliery, Wyllie, Caerphilly, Wales, UK
22.4km (13.9 miles) ⓘGlyn Gwilym Isaf Opencast, Clyne and Melincourt, Neath Port Talbot, Wales, UK
23.5km (14.6 miles) ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK
23.6km (14.7 miles) ⓘLlest Colliery (Lluest Colliery), Pontyrhyl (Pont-y-rhyl), Bridgend, Wales, UK
25.2km (15.7 miles) ⓘTalachddu Mine, Talachddu, Felin-fach (Felinfach), Powys, Wales, UK
28.1km (17.5 miles) ⓘLlanilid West Opencast Coalmine, Llanharan, Rhondda Cynon Taf, Wales, UK
30.9km (19.2 miles) ⓘPark Slip West (Margam Opencast), Cefn Cribwr, Bridgend, Wales, UK
51.5km (32.0 miles) ⓘCliff exposures and Wave platforms, Pwll Du Head, Pennard, Swansea, Wales, UK
References
Bill Gordon collection
 
and/or  
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