Art Deco Marquise Sapphire Engagement Ring in PlatinumThis chic Art Deco engagement ring features 1. 29 carat blue sapphire and diamond accents in platinum. The center marquise cut sapphire has a royal blue hue and is set in protective prongs. Two (2) . 15 carat baguette cut diamonds flank the center stone. From the classic basket mounting to the polished platinum band, this antique engagement ring is bursting with style!