Sterling Silver Blue John Marcasite Square Ring, R751 This one of a kind piece of jewellery features a hand carved, square shaped Blue John gemstone that has been sourced directly from Castleton, Derbyshire. This beautiful British gemstone is surrounded by an intricate frame of sterling silver and sparkling marcasite. The detail in this ring make a gorgeous classic, but contemporary piece of jewellery. 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 rings on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions 12mm x 12mm, Blue John; 4mm x 4mm