Silver blue john marcasite open circle pendant necklace p2142 this femininependantfeatures a roundcabochon of blue johnstone sourced directly from thetreak cliff cavern in castleton the stone is framed by andexquisite sterling silver setting that showcases dazzling marcasite giving the piece a sophisticated sparkle the pendanthangs gracefully from a fluid 18 inch long silver chain complete with a classic bolt ring clasp all our blue john jewellery is designed and crafted within our