Blue john ring round silver large r611 this striking statement ring part of our heritage handmade jewellery collection boasts anunmissable cabochon roundpiece of rare blue john stone that has been sourced directly from treak cliff cavern in castletonthe stone is framed within an exquisite sterling silver setting and completed with a classic sterling silver band all our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of skill