Sterling Silver Blue John Mosaic Stud Earrings, E807. These elegant sterling silver earrings feature small mosaic style pieces of rare Blue John stone that have been sourced directly from Castleton, Derbyshire. The stone are placed within a sterling silver tear drop setting that is completed by post and butterfly fastenings, making them perfect for everyday wear. All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform natural pieces of Blue John into these stunning pieces of jewellery. You can find other matching Blue John jewellery on our website and in stores. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.