Circa 1950s, Platinum, American. This classic fifties platinum ring is all about the scintillating 4.17 carat cabochon opal. Displaying green, blue, orange, and red in varying hues, this stone has excellent fire and sublime play of light. .46 carats of white diamonds surround the main stone, interspersed with hand-textured elements that add visual dimension. Finely made, the look is brilliantly glamorous. Excellent condition.