1950s Mid-Century Diamond Engagement Ring in 14k.  This lovely Mid-Century engagement ring features a .84 carat Old European cut diamond that is set in 14 karat yellow gold. The primary stone is set with four (4) prongs and the .12 carats of bezel set accent stones are set in white gold, creating a beautiful two-tone look on its face. From the side profile you can see that each stone has plenty of space for light to enter and enhance the sparkle.