A ring is a round band, usually made of metal, worn as ornamental jewelry. The term "ring" by itself always denotes jewellery worn on the finger; when worn as an ornament elsewhere, the body part is specified within the term, e.g., earrings, neck rings, arm rings, and toe rings. Rings always fit snugly around or in the part of the body they ornament, so bands worn loosely, like a bracelet, are not rings. Rings may be made of almost any hard material: wood, bone, stone, metal, glass, gemstone or plastic. They may be set with gemstones (diamond, ruby, sapphire or emerald) or with other types of stone or glass.
Although some people wear rings as mere ornaments or as conspicuous displays of wealth, rings have symbolic functions respecting marriage, exceptional achievement, high status or authority, membership in an organization, and the like. Rings can be made to sport insignia which may be impressed on a wax seal or outfitted with a small compartment in which to conceal things.
Rings and other types of jewelry including necklaces, bracelets, earrings, bangles and pendants have been discovered from the 3rd millennium BC Indus Valley civilization. Factories of small beads have been discovered in Lothal, India.
Rings have been found in tombs in Ur dating back to circa 2500 BC. The Hittite civilization produced rings, including signet rings, only a few of which have been discovered. People in Old Kingdom Egypt wore a variety of rings, of which a few examples have been found, including the famous scarab design. Rings became more common during the Egyptian Middle Kingdom, containing increasingly complex designs. Egyptians made not only metal rings but rings from faience, some of which were used as new year gifts. Native styles were superseded by Greek and Roman fashions during the Ptolemaic dynasty.
Archaic Greek rings were to some extent influenced by Egyptian rings, although they tended to be less substantial and were not generally used as working signet rings.