1940s Retro Solitaire Diamond Engagement Ring in 14k.  This Retro two tone engagement ring features .45 carat round brilliant cut diamond set in 14 karat white and yellow gold. The center stone is set in white gold to enhance the white color of the diamond, and the thin shank is full of orderly floral engravings. A very special vintage engagement ring full of wonderful hand engravings to add to the brilliance of this diamond.