sz5 Estate 18k gold Diamond, Ruby, and Emerald ring. Estate 18kt yellow gold ring, set with (ten) uncut diamonds, (eight) round mixed-cut emeralds, medium green, approx 0.50cttw, (eleven) round mixed-cut rubies, purplish-red color, approx 1.00cttw, Size 5. There are faint stampings in the interior but this is a very old ring. It's tested 18k gold and all the stones are tested and natural stones guaranteed.