Blue john ring oblong silver medium r065 this striking statement ring part of our heritage handmade jewellery collection boasts anunmissable cabochon rectangular shaped piece of rare blue john stone that has been sourced directly from treak cliff cavern in castletonthe stoneis set within an exquisite sterling silver base and completed with a thick statement band all our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of skil