Silver blue john marcasite twisted round pendant necklace p2137 this petite romanticpendantboasts a highly polished blue john stone sourced directly from the treak cliff cavern in castleton derbyshire the stone is set at the heartof a sterling silver pendantwhich is embellished with a dazzling marcasite stones giving the piece a sophisticated sparkle thependanthangs from a fluid 18 inch longsterling silver chain complete with a classic bolt ring clasp for easy wear all our blue joh