View our stunning Blue John jewellery collection, exquisite jewellery designs incorporating only the finest quality Blue John. Each stone has been carefully hand selected, and precision cut, to meet our exact standards. Our team of skilled lapidarists turn the naturally formed Blue John stone into stunning unique pieces of jewellery. Blue John is a semi precious gemstone considered to be one of the rarest minerals in the world, found only within the Treak Cliff Cavern, Castleton, Derbyshire Peak District National Park. Treasured as one of the world’s rarest minerals, each piece of Blue John stone is unique, and varied in colour, common veining makes every piece of Blue John jewellery truly special. We offer an unrivalled selection of Blue John rings, earrings, necklaces, and bracelets finished to the highest standard suitable to be worn for all occasions.