Vintage European Cut Diamond Engagement Ring w/ Sapphire AccentsVintage European Cut Diamond Engagement Ring w Sapphire Accents. This Art Deco engagement ring features a . 80 carat Old European cut diamond with . 10 carats of sapphire accents and is set in platinum. The ring has such a clean and elegant design with the bezel setting and the lovely engraving on the shoulders. The deep blue sapphire accents also give this ring just enough color to really stand out in the best way!