Blue john diamond 9ct yellow gold necklace p1014c this stunning and sophisticated necklace boasts an unmissable cabochon tear drop shaped piece of rare blue john stone that has been sourced directly from treak cliff cavern in castleton the stone is placed within an exquisite 9ct yellow gold setting and crowned by an enchanting 003ct diamond set on the bail the pendant hangs gracefully off a matching yellow gold chain completed by a classic bolt ring clasp for easy wear all our blue john je