Sterling Silver Blue John Marquise Celtic Ring, R462. This elegant ring features a marquise cabochon of hand carved Blue John which has been sourced directly from Castleton, Derbyshire. The highly polished Blue John is framed in a beautiful Celtic style band of sterling silver. All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform the natural Blue John stone into these stylish pieces of jewellery. You can find other matching Blue John jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.  Dimensions Blue John; 10mm x 6mm, width of band; 3mm