2.18 Cushion Cut Sapphire and Diamond Ring in 14k White Gold2. 18 Cushion Cut Sapphire and Diamond Ring in 14k White Gold. This modern engagement ring features a 2. 18 carat Cushion Cut sapphire and 1. 30 carats of accent diamonds in shimmering 14 karat white gold. The blue sapphire has highly saturated Admiral blue hue and is set in four prongs. The center stone is flanked by two (2) . 65 carat baguette diamonds. The colorless diamonds bring elegance and brilliance to the fire of the sapphire, thanks to the