Sterling Silver Blue John Marcasite Scalloped Edge Pear Necklace. P2344. This unique necklace features a stunning pear shaped cabochon of the finest Blue John stone that has been sourced directly from the Treak Cliff Cavern in Castleton. The stone is set within the centre of an exquisite sterling silver pendant that is embellished by dazzling marcasite, giving the piece a vintage sparkle. The pendant hangs gracefully from a fluid 18 inch silver chain complete with a classic bolt ring clasp for easy wear. All our Blue John jewellery is designed and crafted within our very own workshops in Derbyshire where a team of skilled craftsmen turn the raw Blue John into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John necklaces on our website. Dimensions: Pendant 41x17mm including bale.