A GROUP OF JEWELLERY, Including a three-stone diamond ring set with tension-set brilliant-cut diamonds weighing approx. 0.25ct in total, European convention mark, UK hallmark, ring U; a diamond-simulant collet-set in a 9ct gold mount, maker's mark, UK hallmark, ring size N½; Together with two rings set with step-cut octogonal amethysts, to 9ct gold mounts, UK hallmark, ring size N½ & P½ (4)