This chunky necklace with pendant is an interpretation of a Brazilian mask. Necklace is shown in Burkholz and Kaplan's book on copper jewelry. They say that he had "....a passion for primitive art and exotic cultures." The chain is about 21 1/2 inches long with a fold-over clasp. The pendant is about 2 1/4 inches across. It shows two masks juxtaposed in a very artistic way. Necklace is all copper and signed Rebajes. It is in excellent condition. It does have old patina. You certainly can polish it if you want to. I would just rub it with a very soft cloth to bring out the sheen.