Sterling Silver Blue John Large Framed Heart Stud Earrings. E433. These romantic stud earrings feature beautiful heart shaped cabochons of the finest Blue John stone, sourced directly from Castleton, Derbyshire. The gemstones are framed in sterling silver and highly polished for a smooth, contemporary finish. Completed with secure sterling silver post and butterfly fittings. 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. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: 7mm x 7mm.