Silver blue john unique cuff bangle b794 this statement bangle boasts a softly curved large triangular shaped piece of blue john stone that has been sourced directly from treak cliff cavern in castleton the stone has been set within asterling silver bangle which sits neatly on your wrist 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 jewe