LATE ROMAN RED GARNET INTAGLIO DEPICTING AN EMPEROR IN GOLD RING. Ca. AD 200 - 300. A late Roman red garnet intaglio depicting a bust of an Emperor, possibly Constantine, facing left. The emperor has short hair and a high diadem on the front of his head. The intaglio is set in a 20.5ct possibly later gold ring. Size: D:17.73mm / US: 7 1/2 / UK: O 1/2; Weight: 14.3g Provenance: Property of a London Ancient art collector, formerly in a Mayfair private collection of Mr. P. S., formerly acquired on the UK art market since the 1970s. This item has been cleared against the Art Loss Register database and comes with a confirmation letter.