Penrhyn Slate Quarry, Bethesda, Gwynedd (Caernarvonshire), Wales, UK
Profits from the quarry financed the construction of Penrhyn Castle at nearby Bangor. A feature of the castle is the great four-poster bed of Penrhyn slate, which weighs four tons.
8 entries listed. 8 valid minerals.
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Locality Updated: Beckley & Buckeye Mine, Siberia summit, Calaveras Co., California, USAFrom Chester S. Lemanski, Jr., 21st Aug 2014 00:24:49