Sterling silver blue john three stone graduated double chain necklace n927 make a statement with this one of a kind necklace featuringthreehighly polished blue john rondelles sourced directly from treak cliff cavern in castleton the stones are interspersed with hand hammered sterling silver discs and presentedon a double silver chain that is fastened by a classic lobster clasp for easy wear all our blue john jewellery is designed and crafted within our very own workshops in ashbourne de