Crafted in the 1950s, this French Mid-Century platinum cocktail ring centers a GIA-certified 5.31-carat oval cut Thai sapphire, enhanced by heat treatment to reveal its vivid hue. Sixteen round brilliant diamonds, totaling .30 carats with G-H color and VS clarity, surround the sapphire in a graceful halo of sparkle. Bearing the French eagle head and maker’s mark and weighing 5.12 grams, this ring captures the elegance and craftsmanship of vintage French design.