AN ART DECO BLACK OPAL AND DIAMOND BROOCH - Centering upon a bezel-set oval-shaped black opal, extending pierced single-cut diamond arched panels, with baguette-cut diamond geometric detail, mounted in platinum, circa 1925
Antique Engagement Ring Opal And Diamond Engagement Ring 5ct Black Opal Ring Art Deco Marquise 1.25ct Old Cut Diamonds 18K Gold
A beautiful original Edwardian platinum ring highlighting a carat oval black opal cabochon dancing with blue and green play of color and wrapped in a double border of bead-set European-cut diamonds carats total weight, F-H color, VS-SI clarity).
RUBELLITE AND DIAMOND RING. The cushion-shaped rubellite weighing carats, flanked by 2 pear-shaped rose-cut diamonds weighing approximately carats, bordered by numerous small round diamonds weighing approximately carats, mounted in platinum