C W Sellors Sterling Silver Blue John Marcasite Round Centre Beaded Edge Ring. R821. A beautiful and elegant floral ring centred with a circular hand carved Blue John gemstone that has been sourced directly from Castleton, Derbyshire. This stunning British gemstone is   surrounded by petal-like beads of marcasite and set in sterling silver. With quite a thick band and stunning design, this ring is certainly an eye-catching piece. Dimensions: 15mm x 15mm, Blue John; 6mm x 6mm. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Matching items available within the collection.