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
Trial level, Vigra Mine, Llanelltyd, Gwynedd, Wales, UK


Locality type:Level
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Erythrite1
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Trial level, Vigra Mine, Llanelltyd, Gwynedd, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:16295
Long-form Identifier:1:3:16295:7
GUID (UUID V4):0
Nearest other occurrences of Gypsum
10.6km (6.6 miles) ⓘBrynycastell Mine, Dolgellau, Gwynedd, Wales, UK
22.3km (13.9 miles) ⓘCastell Carn Dochan, Llanuwchllyn, Gwynedd, Wales, UK
25.5km (15.8 miles) ⓘLodge Park Trial, Tre'r-ddol, Llangynfelyn, Ceredigion, Wales, UK
32.5km (20.2 miles) ⓘDylife Mine (Pen Dylife Mine; Esgairgaled Mine; Llechwedd Ddu Mine; Blaen Twymyn Mine), Dylife, Machynlleth, Powys, Wales, UK
35.5km (22.1 miles) ⓘBritannia Mine, Beddgelert, Gwynedd, Wales, UK
37.5km (23.3 miles) ⓘGoginan Mine, Goginan, Melindwr, Ceredigion, Wales, UK
41.7km (25.9 miles) ⓘCwmrheidol Mine, Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
45.5km (28.2 miles) ⓘFrongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
47.4km (29.4 miles) ⓘGwaithgoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
47.8km (29.7 miles) ⓘCae Coch Mine, Trefriw, Conwy, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
and/or  
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