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Goethite, Quartz, Quartz (Var: Smoky Quartz)

Locality: Wheal Drea, Wheal Owles, Botallack, St Just, St Just District, Cornwall, England, UK

Botryoidal goethite with well developed concentric-radiating structure and a shiny black surface that is partly overgrown by fine-grained quartz. Small dark brown smoky quartz crystals sit in the centers of the nodules - a classic association at Wheal Drea. Specimen size: 7 x 4.5 x 3.5 cm. Collected by myself in August 2009. P Haas photograph and collection.

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Photo added: 20th Apr 2010

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