Bwlch y Plym Mine, Llanfrothen, Gwynedd (Merionethshire), Wales, UK
Primarily a lead mine although sphalerite and some copper ore was known to occur. The principal gangue mineral was quartz, although calcite was fairly common.
UK Grid Reference: SH627415
An old mine, said to have been worked in 1577 and in the 1680s, it was then worked at various times between 1849-75 when 355 of lead ore concentrates is recorded. In 1874 150 ounces of silver were recovered from 150 tons of lead ore.
Although reopened about 1916-17 by the Union Zinc Company Ltd. and a new mill erected (SH 624412), the mine did not survive the 1921 slump in metal prices in 1921 and has remained inactive since.
Ref.: Northern Mines Research Society, British Mining No. 6, The Mines Of Merioneth. J R Foster-Smith, 1977
| Calcite|| Galena|| Quartz|| Sphalerite|
4 entries listed. 4 valid minerals.
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Locality Updated: Longwood Range peridotite outcrops, Southland, South Island, New ZealandFrom Judy Rowe, 5th Dec 2013 00:19:36