C W Sellors Sterling Silver Blue John Swirl Bead Ball Necklace, P2313. This quirky little pendant has been made using the highest quality Derbyshire Blue John and solid sterling silver. The delicate filigree swirls of silver reveal small Blue John beads that are trapped inside, making a very individual and eye-catching piece of jewellery.The price of this item also includes an 18 inch silver chain. Dimensions: 38mm x 25mm.  All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Matching items are also available within this collection.