So what actually makes vintage costume jewelry unique and potentially valuable? Even when talking about the collectible costume pieces, all of the jewelry is mass-produced using cheaper materials than used to make the finer jewelry. Mass-produced and made from inexpensive materials, costume or fashion jewelry was essentially the cheap but gorgeous alternative to fine jewelry. In spite of their humble origins, the vintage pieces produced in factories using semi-precious materials are now considered collectibles worth well beyond their original price. If ...