Sterling Silver Whitby Jet Blue John Double Sided Flip Ring, R1043. This sleek and contemporary double-sided flip ring features a highly polished, hand carved Whitby Jet cabochon on one face, and on the reverse side features a unique piece of Derbyshire Blue John, all set into a simple sterling silver frame. Simply rotate the frame for a different look. This ring would make the perfect addition to any gemstone lovers collection. All our Whitby Jet and 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 Whitby Jet and Blue John into these stylish pieces of jewellery. You can find other matching Whitby Jet and Blue John jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.