.54 Art Deco Diamond Solitaire Engagement Ring in Platinum. This solitaire Art Deco engagement ring features a .54 carat old European cut diamond and engraved accents in platinum. The glittering center diamond is colorless and bright, offering ample amounts of scintillation and fire. The diamond is set in a six (6) pronged antique basket with platinum filigree wire work visible from the gallery view. The shank of the ring has detailed, linear engravings that ring true to iconic Art Deco style. The band is softly tapered and very comfortable to wear.