Description: Paracelsian Bennalt mine, Lleyn Peninsular, Caernarvonshire, Wales, uk Exceptional group of paracelsian crystals - the large doubly terminated crystal is 50mm. Ex collection Natural History Museum, London. Specimen obtained by the Natural History Museum from Sir Arthur Russell in 1941, who in turn obtained it from G.J. Williams, the former Assistant Inspector for Metalliferous Mines and Quarries for the North Wales and Ireland Division. Specimen originally collected in 1919.

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