Two-Tone Retro Diamond Engagement Ring in 14 Yellow White Gold.  This two-toned Retro engagement ring features a .20 carat round brilliant cut diamond set in 14 karat white gold and 14 karat yellow gold. The stone is set with 12 prongs in a lovely square section with little engravings on the corners. The shoulders are accented with small round diamonds. Being in white gold enhances the brightness of each diamond, while the yellow gold provides lovely contrast and dimension.