9ct Yellow Gold Blue John Dinky Oblong Necklace. P451. This elegant necklace features a stunning oblong shaped cabochon of the finest Blue John stone, sourced directly from Castleton, Derbyshire. The beautiful 9ct yellow gold pendant hangs gracefully from a fluid 18 inch long 9 carat yellow gold chain complete with 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 transform natural pieces of Blue John into these stylish pieces of jewellery. You can find other matching Blue John jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: 19x5mm, Blue John: 11x4mm.