Sterling silver blue john marcasite scalloped edge pear necklace p2344 this unique necklace features a stunning pear shapedcabochon 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 inchsilver chain complete with a classic bolt ring clasp for e