Silver Blue John Marcasite Pear Centre Beaded Edge Ring. R823. This striking statement ring boasts a tear drop shaped cabochon of rare Blue John stone that has been sourced directly from the Derbyshire Blue John Cavern in Castleton. The stone is placed within an exquisite sterling silver setting further detailed and embellished by dazzling marcasite, bringing a sophisticated sparkle to the piece. The ring is completed by a classic sterling silver band with marcasite stones on the shoulders. All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen turn the raw Blue John stone into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John rings on our website. Silver Blue John Marcasite Pear Centre Beaded Edge Ring