Sterling Silver Blue John Marcasite Double Marquise Ring, R814. This simple and stylish ring boasts a marquise shaped cabochon of Blue John stone that has been sourced directly from Castleton, Derbyshire. The stone has been placed within an exquisite sterling silver setting encrusted with dazzling marcasite, bringing a sophisticated sparkle to the piece. The ring is completed by four split shoulders and a classic sterling silver band. 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 stunning 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 31mm x 15mm,  Blue John; 16mm x 5mm.