Sterling Silver Blue John Heart Spiral Necklace. P2543 This contemporary necklace features a round hand carved Blue John gemstone sourced from Castleton in Derbyshire which is set within the centre of a polished abstract heart shaped swirl of serling silver. This item is supplied complete with and 18 inch silver chain. Dimensions: 14mm x 14mm. All articles Purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Matching items are available within this collection.