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
Esgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK


05241790017369472889391.jpg
Marcasite

Esgair Hir & Esgair Fraith mines, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
00890440017369472892460.jpg
Marcasite, etc.

Esgair Hir & Esgair Fraith mines, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
05241790017369472889391.jpg
Marcasite

Esgair Hir & Esgair Fraith mines, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
02182330017272018175520.jpg
Marcasite, etc.

Esgair Hir & Esgair Fraith mines, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
05804400017272036336212.jpg
Marcasite

Esgair Hir & Esgair Fraith mines, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
02182330017272018175520.jpg
Marcasite, etc.

Esgair Hir & Esgair Fraith mines, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
Locality type:Mine
Classification
Species:Marcasite
Formula:FeS2
Comments:Bladed xls to 2mm
Habit:Typical habits
Quality for species:Poor for species, only of interest for locality collectors. (#)
Confirmation
Validity:Confirmed
Confirmation Methods:Optical Analysis
Associated Minerals Based on Photo Data:
Susannite3
Anglesite3
Bechererite2
Pyrite2
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Esgair Hir & Esgair Fraith mines (Cambrian Mine; Cardigan Consolidated Mine; Welsh Potosi Mine; Kylon Potosi Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:16883
Long-form Identifier:1:3:16883:6
GUID (UUID V4):0
Nearest other occurrences of Marcasite
1.9km (1.2 miles) ⓘBlaenceulan Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
2.1km (1.3 miles) ⓘEaglebrook Mine, Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
3.7km (2.3 miles) ⓘBryn-yr-Afr Mine, Ponterwyd, Trefeirig, Ceredigion, Wales, UK
6.9km (4.3 miles) ⓘBrynarian Mine (Cardigan Bay Consols Mine), Tre-Taliesin, Llangynfelyn, Ceredigion, Wales, UK
7.6km (4.7 miles) ⓘErglodd mine (Eurglawdd Mine), Tre-Taliesin, Llangynfelyn, Ceredigion, Wales, UK
8.1km (5.1 miles) ⓘLlechwedd Helyg Mine (Willow Bank Mine), Pen-bont Rhydybeddau, Trefeirig, Ceredigion, Wales, UK
8.2km (5.1 miles) ⓘAlltycrib Mine (Talybont Mine; Middleton Mine; North Cardigan Mine), Tal-y-bont, Ceulanymaesmawr, Ceredigion, Wales, UK
8.3km (5.2 miles) ⓘPlynlimon Mine, Ponterwyd, Cwmrheidol, Ceredigion, Wales, UK
12.1km (7.5 miles) ⓘBacheiddon Mine, Penegoes, Powys, Wales, UK
12.5km (7.8 miles) ⓘYstumtuen Mine, Ystumtuen, Cwmrheidol, Ceredigion, Wales, UK
References
Rust, S. A., Mason, J. S. (1988) The Minerals of Esgair Hir Mine, Bwlch-y-Esgair Hir, Ceulanymaesmawr, Dyfed, Wales . UK Journal of Mines and Minerals 5, 35-43
Day, Harry (1999) BMS Database, British Micromount Society.
 
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