Diamond and gemstone ring set3 pcs, 750 yellow gold, hallmarked, each ring with 4 brilliant-cut diamonds, each approx. 0.30 ct, total diamonds approx. 0.90 ct, H, vvs-vs, one ruby, one emerald and one cabochon-cut sapphire, each approx. 0.30 ct, ring size 56, total weight approx. 13.5 g, emerald with traces of wear