This is a vintage ring, which is made of 9 carat gold and is set with a single opal. The stone is probably from Coober Pedy in Australia. It is nicely domed and is 1cm high and 8mm wide. It displays quite strong flashes of pink, green and blue. The stone is framed by a dotted gold surround, which makes the front of the ring ca. 1.3cm high and 1cm wide. The inside is hallmarked for London 1939. The ring is size K and is in excellent condition.