Mid-Century 1.34 Marquise Diamond Engagement Ring in 14k White GoldMid Century 1. 34 Marquise Diamond Engagement Ring in 14k White Gold. Stylish beyond its time, this Mid Century engagement ring features 1. 52 carats of diamonds finished in 14 karat white gold. The center stone is a 1. 34 carat marquise cut diamond. The center stone has beautiful, kite shaped facets and is mounted in four prongs. The primary diamond is flanked by two (2) . 09 carat baguette diamonds. From the profile, a Mid Century basket mounting