This open-cast copper mine (closed in 1975) is unique being the only mine in the British Isles to have produced mercury, albeit as a by-product. Most of this came from mercurian tennantite, but cinnabar crystals up to 2 mm have been found by collectors scouring the enormous dumps.
It is also home to the exceedingly rare gortdrumite and to the best tyrolite from the British Isles.
Grid ref: R870410
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Map Reference: 52°31'19"N , 8°11'13"W
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Mineral List:21 entries listed. 19 valid minerals. 1 type locality (valid mineral).
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