Sterling Silver Blue John Marcasite Round Stud Earrings. E1634. These exquisite earrings boast two stunning cabochon of rare Blue John stone that has been sourced directly from the Derbyshire Blue John Cavern in Castleton. The stone is placed within an enchanting sterling silver flower design that has been embellished by dazzling marcasite stones, giving the earrings a sophisticated sparkle. The studs are completed by classic post and butterfly fastenings 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 earrings on our website.