18ct white gold blue john square 034 carat diamond necklace p1551c this sophisticatednecklace boasts a 086 carat square faceted piece of rare blue john stone that has been sourced directly from treak cliff cavern in castleton the stone is nestled within exquisite 18ct white gold that has been embellished by dazzling 034 carat diamonds for an eye catching finish the pendant hangs gracefully from a white gold bail and chain that is fastened by a classic bolt ring clasp for easy wear all o