Yellow sapphire and diamond ring. Photo Sotheby's. The cushion-shaped yellow sapphire weighing 30.94 carats, set between triangular diamonds, size 531/2, British hallmarks. Estimation 14,000 — 23,000 CHF Accompanied by SSEF report no. 72259, stating that...

Yellow sapphire and diamond ring, Buccellati. Photo Sotheby's. The oval yellow sapphire set within a sculptural mount accented with brilliant- and single-cut diamonds, signed Buccellati, size 491/2, one small diamond deficient. Estimation 27,000 — 45,000...

A yellow sapphire and diamond ring. Photo Bonhams. centering a cushion-cut yellow sapphire, weighing 32.85 carats, within an openwork, pavé-set diamond gallery and mount; signed OSJ for Oliver Smith Jeweler, Scottsdale; estimated total diamond weight:...