Sterling Silver Blue John Marcasite Capped Pear Drop Necklace. N944. This elegant necklace features a hand carved, highly polished tear drop of rare Blue John stone that has been sourced directly from Treak Cliff Cavern in Castleton. The stone is embraced by a sterling silver vintage style cap which is embellished by glittering marcasite stones. The pendant sits gracefully on a fluid 18 inch long sterling silver chain that is completed by a classic bolt ring clasp for easy wear. 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. Dimensions: Pendant 35x25mm.