18ct white gold blue john 025 carat diamond pear shoulder ring r1010 this elegant 18ct white gold ring featuresa stunning pear shapedhand carved blue john stone that has been sourced directly from the treak cliff cavern in castleton derbyshiresparkling diamondstotaling 025 carats embellish the shoulders and frame the stone all our blue john jewellery is designed and crafted within our very own workshops in derbyshire where a team of skilled craftsmen turn the raw blue john into these