18ct White Gold Blue John Whitby Jet Large Double Sided Round Fob Necklace, P012. This classic fob necklace is part of the C W Sellors Heritage handmade collection and features a double sided wedding ring pendant set with round cut locally sourced Blue John and Whitby Jet. The stones are set in a hinged 18ct white gold pendant, which can be worn on either side and features a unique design, hanging gracefully from an 18 inch 18ct white gold chain.  All our gemstone jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform the natural gemstones into these stunning pieces of jewellery. You can find other matching gemstone jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.