18ct white gold blue john 024 carat diamond shoulder ring r1040 this elegant 18ct white gold ring featuresa stunning ovalshapedhand carved blue johnstone that has been sourced directly from the treak cliff cavern castletonthe stone is framed by an oval surround of sparkling diamonds which also continue down the shoulders of the ring to stunning effect a beautiful ring featuring a rare british gemstone it would make a gorgeous engagement ring or a beautiful gift for someone special