Sterling Silver Blue John Marcasite Thirteen Stone Twist Link Necklace. N892. This glamorous sterling silver necklace features thirteen genuine Blue John semi-precious gemstones which have been hand carved in our workshop. The stones are highlighted with sparkling marcasite stones set into sterling silver frames. The intricate and unique twisted link design completes the piece and the overall effect is feminine with a vintage feel. 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 necklaces on our website. All articles purchased from CW Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Matching items are available within this collection.