A necklace is an article of jewellery 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. Common features of necklaces include colorful stones (particularly gemstones or jewels), wood (usually carved or polished), art glass, feathers, shells, beads or corals - a wide, wide variety of other adornments have also been used.