Silver blue john marcasite pear drop stud earrings e2236 these stunning drop studearrings feature pear shaped hand carved blue johngemstones set at the heart of a sterling silver and marcasite frame these earringsuse only the finestblue johnstone which has been sourced directly from treak cliff cavern in castleton they hang elegantly from sterling silver studs all our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of ski