Cushion Cut Sapphire Diamond Engagement Ring in Platinum.  This fabulous ring features a 3.31 carat cushion cut sapphire and 1.5 carats of round brilliant accent diamonds set in platinum. The sapphire is set with double prongs in its four corners and wrapped with a dazzling diamond halo. The open basket is adorned with diamonds  and allows plenty of light into the sapphire, flooding the undercarriage with a beautiful blue glow. This is a stunning modern ring that would make an amazing engagement ring as well as a striking cocktail ring.