Silver Blue John Oval Rope Edge Ring. R008. This striking statement ring is part of our Heritage handmade jewellery collection and boasts a stunning cabochon oval shaped piece of the finest Blue John stone that has been sourced directly from Treak Cliff Cavern in Castleton. The stone is placed within an exquisite Sterling Silver rope setting and is completed with a split shoulder 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 turn the raw Blue John stone into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John rings online and instore. Silver Blue John Oval Rope Edge Ring, Dimensions 10 x 8mm stone.