Sterling Silver Blue John Oval Split Shoulder Ring. R025. This elegant ring is part of our Heritage handmade jewellery collection and boasts a striking oval cabochon of the finest Blue John stone that has been sourced locally from Castleton, Derbyshire. The stone is simply but classically framed in sterling silver with open detailing on the shoulders. All our Blue John jewellery is designed and crafted within our very own workshops in Derbyshire where a team of skilled craftsmen transform the natural Blue John into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John rings online and in-store. Dimensions: Blue John Stone: 7x4mm.