Ring in 750 white gold and 850 platinum, featuring an onyx plate set at its center with a modern brilliant-cut diamond of approximately 0.30 ct, surrounded by forty-four rose-cut diamonds (estimated G/SI, minor chips and scratches on the onyx). Art Deco-era craftsmanship. Estimated total diamond weight: 0.1 ct Setting dimensions: 1.7 x 1.7 cm Ring size: 52.5 Gross weight: 5.2 g