The Rockefeller Emerald snared $5.5 million ($305,000 per carat), at Christie’s June 20 auction in New York City, setting a new per-carat record for an emerald. That was within its announced $4 million to $6 million estimate. The buyer was Harry Winston, which rechristened it the Rockefeller-Winston Emerald. The 18.04 ct. step-cut Colombian stone, mounted […]
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