This is a gold body-chain, and whilst often seen in Hellenistic and Roman art actual examples are rare. It is likely to only ever have been worn once by the young woman or teenage girl for whom it was made. Only five of the gems at the front have survived, there were originally nine. At the back where the chains join together there is a coin within a decorated mount, it dates back to AD 367-83. I came across it at the British Museum.