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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Gypsum from
Dylife Mine (Pen Dylife Mine; Esgairgaled Mine; Llechwedd Ddu Mine; Blaen Twymyn Mine), Dylife, Machynlleth, Powys, Wales, UK


Locality type:Mine
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Dylife Mine (Pen Dylife Mine; Esgairgaled Mine; Llechwedd Ddu Mine; Blaen Twymyn Mine), Dylife, Machynlleth, Powys, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:18244
Long-form Identifier:1:3:18244:7
GUID (UUID V4):0
Nearest other occurrences of Gypsum
19.4km (12.0 miles) ⓘLodge Park Trial, Tre'r-ddol, Llangynfelyn, Ceredigion, Wales, UK
20.5km (12.7 miles) ⓘCwmrheidol Mine, Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
21.0km (13.0 miles) ⓘGoginan Mine, Goginan, Melindwr, Ceredigion, Wales, UK
24.0km (14.9 miles) ⓘFrongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
24.6km (15.3 miles) ⓘBrynycastell Mine, Dolgellau, Gwynedd, Wales, UK
26.4km (16.4 miles) ⓘGwaithgoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
32.5km (20.2 miles) ⓘTrial level, Vigra Mine, Llanelltyd, Gwynedd, Wales, UK
36.7km (22.8 miles) ⓘCastell Carn Dochan, Llanuwchllyn, Gwynedd, Wales, UK
52.1km (32.4 miles) ⓘDolyhir Quarry, Old Radnor, Powys, Wales, UK
52.8km (32.8 miles) ⓘMoel Ferna Mine, Corwen, Denbighshire, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
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