Silver Blue John Bead End Torc Twist Bangle. B724. This elegant, classic solid Sterling Silver torc style bangle is part of our Heritage handmade jewellery collection and boasts twist detailing and stunning hand carved Blue John beads mounted at each end. The stone has been sourced directly from Treak Cliff Cavern in Castleton. 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 bangles on our website. Silver Blue John Bead End Torc Twist Bangle. Blue John stone 8mm diameter.