Blue John Necklace Oval Silver Medium. P080. This simple and sophisticated necklace is part of our Heritage handmade jewellery collection and boasts a stunning cabochon oval piece of rare Blue John stone that has been sourced directly from Treak Cliff Cavern in Castleton. The stone is framed within an exquisite Sterling Silver setting. The pendant sits gracefully on a delicate Sterling Silver chain that is completed by a classic bolt ring clasp for easy wear. 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 necklaces online and instore. Blue John and Sterling Silver pendant, dimensions 23 x 13mm stone, complete with a fine 18" Sterling Silver chain (00042541).