C W Sellors Sterling Silver Whitby Jet Ribbed Square Shape Necklace. P321 This square shaped hand carved original Whitby Jet gemstone is set in a ridged sterling silver square frame, hanging from a bale on the top via a tiny link that allows gentle movement when worn. This pendant is supplied complete with an 18 inch silver chain. Dimensions: 18mm x 11mm, Whitby Jet; 8mm x 8mm. 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.