Antique Diamond and Burmese Ruby Ring. ntique cocktail ring with diamonds and two pear shaped Burmese rubies. You know you want to own at least one antique cocktail ring. Well now is your chance to acquire this rare beauty. ~1.10 carats of natural Burmese ruby, ~2.20 carats of old cut round diamonds. Edwardian styling throughout. Via 1stdibs.