ROMAN AMETHYST INTAGLIO PORTRAIT OF AN EMPRESS IN HIGH KARAT GOLD RING. Ca. AD 200 - 400 A deep purple amethyst intaglio carved with the left-facing portrait of an imperial lady, set in an oval gold bezel with a raised rim, the mount joined to a broad flat hoop that tapers evenly towards the back. Size: D:17.93mm / US: 7 3/4 / UK: P; Weight: 8.24g. Provenance: Private London collection; previously part of an early 2000s UK ancient art collection; formerly in the collection of G.M., prior to 1996. This item has been cleared against the Art Loss Register database and comes with a confirmation letter.