Vintage amethyst cocktail ring set with an oval faceted amethyst measuring approx. 0.63" x 0.44" yellow claw set to a raised mount with draped rope twist decoration to tri-split shoulders.  D shaped cross section band bearing the marks for the London Assay Office for 1971.  Finger size 5 1/8 (US/Canada); K (UK/Australia). 

Vintage Amethyst Gold Cocktail Ring, Hallmarked London 1971