Silver Blue John Narrow Oval Stone Bangle. B018. This simple and sophisticated bangle is part of our Heritage handmade jewellery collection and boasts a stunning oval piece of Blue John, also known as Derbyshire Spa, sourced directly from the Treak Cliff Cavern in Castleton. The highly polished stone is framed within exquisite Sterling Silver and the bangle is completed with a solid Sterling Silver band.The two combined help to create one of the most elegant silver bangles available. All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen turn the raw Blue John stone into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John necklaces online and in-store. Silver Blue John Narrow Oval Stone Bangle, dimensions 23 x 10mm stone.