ROMAN SILVER RING WITH BLACK GLASS CAMEO DEPICTING AN EMPEROR Ca. AD 150 - 250. A silver ring composed of a D-section hoop, enlarged on the shoulders to form the bezel securing a black glass cameo. The cameo showcases a translucent black-grey shade and depicts the emperor frontally. For similar see: Entwistle Ch. and Adams, N., ‘Gems of Heaven’: Recent Research on Engraved Gemstones in Late Antiquity, c. AD 200–600, Plate 7 and 10, p. 132. Size: D:17.53mm / US: 7 1/4 / UK: O; Weight: 10g. Provenance: Property of a London Ancient Art Gallery; formerly in the famous Alison Barker collection, a retired London barrister; acquired between the early1960s to 1990s. This piece is accompanied by an authentication statement by Sami Fortune, ancient jewellery specialist.