Circa 100 -200 AD.The plain solid hoop rounded on the interior and exterior, expanding to the shoulders, the flat bezel set with a convex oval eye agate decorated with a central figure of a horseman holding a spear. For similar see Henig, Classical Gems, Ancient and Modern Intaglios and Cameos in the Fitzwilliam Museum, Cambridge. Ring possibly of a later period. 22kt gold ring. Size: D: 16.1mm / US: 5 1/2 / UK: L; 16.2gProvenance: Central London privare collection of Ancient Art and jewellery; acquired from an East Coast, US estate collection formed before 1979.