Pretty little opal ring - the mount is 9ct yellow gold, and the opal is a blue/green doublet stone with red flashes. Ring face measures 7 mm by 5 mm plus the gold tubing surrounding the stone. Ring fitting is English size N (USA size 6.1/2) with an internal diameter of 16.92 mm. Stamped 9ct inside the band. Probably dates around 1950s-60s. Flat band, so very comfortable to wear. Excellent condition.