Sterling Silver Blue John Three Stone Oval Foxtail Bracelet. B978. This stunning bracelet is part of our Foxtail collection, designed and made by C W Sellors. The piece features three oval shaped Blue John stones that have been directly sourced from Treak Cliff Cavern in Castleton. The stone is set on an intricate sterling silver foxtail chain that is fastened by a strong magnetic clasp for easy wear. All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen turn the raw Blue John stone into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John bracelets on our website. Blue John Central stone 18x14mm and two adjoining stones 14x10mm.