Shop our collection of Derbyshire Blue John Jewellery. Blue John stone is a rare, semi-precious mineral, fluorite, found at only one location in the world. This is at Treak Cliff Cavern which is at the western end of Hope Valley near Castleton in Derbyshire, England. The name Blue John derives from the French Bleu Jaune, meaning Blue John. It was first discovered by miners exploring the cavern for lead. At Hollins and Hollinshead our unique pieces of Derbyshire Blue John jewellery is set on sterling silver, explore our pendants, earrings and bracelets.

Derbyshire Blue John & Jet

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