Sterling Silver Blue John Medium Oblong Ring. R065. Part of our handmade Heritage collection, this statement ring features a stunning cabochon of the finest Blue John stone, sourced directly from Castleton, Derbyshire. The gemstone is framed in a highly polished sterling silver base with a wide, split shoulder 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 natural pieces of Blue John 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: Width of band at back: 5mm. Blue John: 25mm x 12mm.