C W Sellors Sterling Silver Whitby Jet Ammonite Shaped Necklace, P1677 The unique ammonite design of this sterling silver and Whitby Jet pendant gives a very organic feel that is perfect for summer styles and a natural look. This item is supplied complete with an 18 inch silver chain. Dimensions: 25mm 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.