Castell Mine (Dyffryn Castell Mine; New Castell Mine; West Esgairlle Mine; Gwaithddu Mine; Cripiau Bach Mine), Ponterwyd, Cwmrheidol, Ceredigion (Dyfed; Cardiganshire), Wales, UK

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Castell mine was first recorded as being opened by Thomas Bonsall in 1785 for sphalerite. It appears to have been closed by 1803. The vein is a major fault system which has been traced for several kms, and has been exploited by a number of mines and trials along its lenth.
The next recorded working was in 1850, and was reworked on at least 11 more occations, the last opening was in 1916-17.

Recorded output:
5365 tons of zinc ore
139 tons of lead ore
25 tons of copper ore

UK OS Grid Reference: SN775812
Map Reference: 52°24'52"N , 3°48'4"W

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Mineral List:

Albite ?
'Apatite'
Aragonite
Aurichalcite
Calcite
Chalcopyrite

Dolomite
var: Ferroan Dolomite
Galena
Goethite
Hemimorphite
Hydrozincite
Malachite

Muscovite
Pyrite
Quartz
Rutile
Sphalerite
'Wad'

18 entries listed. 15 valid minerals.

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