Roman Gold Ring with Blue Cabochon

1st-2nd century AD. A gold ring with slender round-section hoop, oval-shaped bezel with raised cell set with a blue glass cabochon, enclosed by applied beads. 0.94 grams, 17.32mm overall, 13.65mm internal diameter (approximate size British E, USA 2 1/4, Europe 2.41, Japan 2) (3/4"). Formerly in the collection of a deceased Japanese gentleman, 1970-2010.
Condition Report: Fine condition.