Sterling Silver Blue john Open Heart Twist Drop Earrings, E2314. These elegant earrings feature a hand carved heart shaped Blue John gemstone, which is sourced directly from Castleton in Derbyshire and framed by an open Celtic style heart shaped framework of solid sterling silver. Secured with a gold hook fastening. Dimensions: 27mm x 15mm, Blue John; 8mm x 6mm. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Matching items are available within this collection.