Sterling Silver Blue John Marcasite Beaded Edge Necklace. p2138. This elegant necklace is part of our heritage handmade jewellery collection and boasts a stunning oval shaped cabochon of Blue John stone that has been sourced directly from Castleton, Derbyshire. The stone is held within exquisite Sterling Silver which makes up the setting and band, accented beautifully by Marcasite stones.  All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform the natural Blue John stone into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John necklaces on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: 40mm x 20mm including the bail.