The necklace is a chain jewelry which is worn around the neck. Necklaces are frequently formed from a metal jewellery chain. Others are woven or manufactured from cloth using string or twine. Usually use the gold and silver and other precious metals or jewelry made of, but sometimes use different materials such as wood, stone, shells. If a necklace includes a primary hanging feature, it is called a pendant or amulet, if the hanging feature is itself a small container, that is called a locket. Necklace has a wide range of uniquely shaped, so it has strong decorative.