Sterling silver blue john small cross heart dropper ring r641 this stylish ring is part of our cross heart collection it features a small sized hand carved heart shaped blue johnstone that has been sourced directly from the treak cliff cavern in castleton the individual highly polished blue john has been framed within a sterling silver mount that embraces the gemstonein a cross design all our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshi