An exceptional octagonal-shaped emerald ring. Photo: Christie's Images Ltd., 2010 Set with an octagonal-shaped emerald weighing 25.83 carats, to the shield-shaped diamond shoulders, mounted in platinum, size 6. Estimate CHF650,000 - CHF850,000 - Price...

HARRY WINSTON A Spectacular Columbian Emerald and Diamond Necklace Designed as a tapered circular, baguette and pear-shape diamond line, mounted in platinum, length 37cm, suspending a detachable 70 carat octagonal-shaped emerald, within a three-tiered...