.81 Antique Art Deco Diamond Cocktail Ring 18kThis Art Deco cocktail ring features a . 81 carat old European cut diamond at the center, set in 18 karat white gold with ornate filigree mounting. Four round brilliant cut diamonds totaling . 88 carats (with a combined total diamond weight of 1. 67 carats) accent the ring in a navette shaped arrangement. Old European cuts were hand cut during the early 20th century and have a different facet pattern than modern diamonds, producing softer light return