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
Plynlimon Mine, Ponterwyd, Cwmrheidol, Ceredigion, Wales, UK


Locality type:Mine
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Plynlimon Mine, Ponterwyd, Cwmrheidol, Ceredigion, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:18684
Long-form Identifier:1:3:18684:1
GUID (UUID V4):0
Nearest other occurrences of Marcasite
5.4km (3.3 miles) ⓘBryn-yr-Afr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK
6.8km (4.2 miles) ⓘEaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
8.3km (5.2 miles) ⓘEsgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
9.0km (5.6 miles) ⓘPenrhiw Mine (Penyberth Mine), Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
9.2km (5.7 miles) ⓘYstumtuen Mine, Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
9.3km (5.8 miles) ⓘBlaenceulan Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
9.8km (6.1 miles) ⓘCwmrheidol Mine, Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
11.1km (6.9 miles) ⓘLlechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
12.5km (7.8 miles) ⓘBacheiddon Mine, Penegoes, Powys, Wales, UK
13.4km (8.3 miles) ⓘFrongoch Mine, Pontrhydygroes, Upper Llanfihangell-y-Creuddyn, Ceredigion, Wales, UK
References
Day, Harry (1999) BMS Database, British Micromount Society.
 
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