Blue John Ring Framed Marquise Silver. R497. This simple and sophisticated ring is part of our Heritage handmade jewellery collection and boasts a stunning marquise shaped piece of Blue John stone that has been sourced directly from Treak Cliff Cavern in Castleton. The stone is framed within an exquisite Sterling Silver setting and completed with 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 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 on our website Blue John and Sterling Silver ring, dimensions 15 x 8mm stone.