The item is always kept on death (with a few exceptions like the Crucible). If lost a spare one can be received by talking to Nails Newton in Taverley near the lodestone. To determine if the necklace is worth carrying in an inventory slot, here are three equations: * Constitution restore without necklace = * Constitution restore with necklace worn = * Constitution restore with necklace in inventory = where is number of inventory spaces available for food is constitution restored by the food you plan on bringing with you.