18ct Yellow Gold Blue John 0.15ct Diamond Wave Necklace, PUNQ0003763.  This elegant pendant features a perfectly carved piece of Blue John stone, that has been sourced directly from Castleton, Derbyshire. Showcasing the range of colours in Blue John, the gemstone is neatly partnered by three brilliant cut delicate diamonds, which are bezel set into the organic 18ct yellow gold bail. At C W Sellors, we have an expert team of gemstone and diamond specialists who handpick and grade each jewel to meet our high standards and a team of talented in house designers who combine their talents to bring you our exclusive Precious Gemstone collection. You can find other Blue John pieces online and in store to complement this necklace. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.