18ct Yellow Gold Oval Blue John 1.57 Carat Pave Diamond Necklace. P1451C. This classic, elegant pendant necklace boasts a stunning oval cabochon piece of rare Blue John stone that has been sourced directly from Treak Cliff Cavern in Castleton. The stone is nestled within exquisite 18ct yellow gold that has been embellished by dazzling 1.57 carat diamonds around the edge and on the bail for an eye catching finish. The pendant hangs gracefully from an 18ct yellow gold chain that is fastened 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 on our website. 18ct Yellow Gold Oval Blue John 1.57 Carat Pave Diamond Necklace