1940s Retro Diamond Engagement Ring in Yellow White Gold.  This two-toned Retro engagement ring features a 1.00 carat round brilliant cut diamond set in 14 karat yellow gold with accent diamonds set in white gold. The primary diamond is set with large flat prongs that allow plenty of light into the bright white stone. On the shoulders sit two diamond shaped sections in white gold with milgrain detail that hold the accent diamonds. This fine engagement ring has a neat design with a clever use of white metal to enhance its sparkle.