Sterling Silver Blue John Large Flower Brooch, M196. The sterling silver arches that surround the oval Blue John gemstone set at the centre of this brooch represent the stylised petals of a flower. The Blue John is sourced directly from Castleton, Derbyshire and the brooch is set with a horizontal bar pin.  All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform natural pieces of Blue John into these stunning pieces of jewellery. You can find other matching Blue John jewellery on our website and in stores. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: 34mm x 40mm, Blue John; 19mm x 24mm