Sterling silver blue john seventeen pearl medium cross heart necklace p2258 this elegant necklace is part of our cross heart collection it features a medium sized hand carved heart shaped blue john stone which has been sourced directly from the derbyshire blue john cavern in castleton the individual highly polished blue johnhas been framed within a sterling silver seventeen pearl mount that embraces the gemstonein a cross design itsits gracefully on a 18 sterling silver chain completed