Vintage Two-Tone Edwardian Ring with Diamond Sapphire.  This vintage two-tone Edwardian cocktail ring features a 1.55 carat cushion cut sapphire set in platinum and 14 karat yellow gold. The gorgeous filigree mounting leads a row of diamonds around the sapphire with parallel wires connecting and filling in the negative space. Below the yellow gold shank provides lovely contrast with the myriad of colors in the face of the ring.