Antique Art Deco Sapphire Engagement Ring Platinum.  This Art Deco engagement ring features stunning 1.24 carat round cut sapphire with .12 carats of diamond accents all set in platinum. The sapphire is set with four (4) large prongs of high polished platinum that looks very nice above the bright blue color. The shoulders feature a geometric design making use of triangular open spaces around the baguette and round cut accent stones. A classic design completed with expert craftsmanship in the style of the Art Deco era.