Three Stone Diamond Filigree Engagement Ring in Platinum. Elegant and sparkling, this Art Deco three stone engagement ring features 1.08 carats of old European and Round Brilliant cut diamonds finished in platinum. Three (3) .36 carat colorless diamonds are each set in six platinum prongs. The balance of Round Brilliant and old European facets of the diamonds reflect light and glitter from every angle. From the profile, a vintage filigree basket holds the collection of stones, finished on a polished platinum band.