1940s rose cut diamond and white sapphire cocktail ring in gold

1940s rose cut diamond and white sapphire cocktail ring in 18kt yellow gold. Set with a round rose cut diamond in a rubover setting, flanked by six round mixed cut white sapphires in grain settings, to a voluminous cocktail ring featuring flush settings, openwork details and ribbed fan motifs, met to either side with broad trumpeting shoulders which smooth to a solid shank. Hallmarked 18kt gold, French.