The Rockefeller Emerald, a rare, mesmerizing 18.04 carat octagonal step-cut Colombian emerald set in a platinum and diamond ring, was recently sold at auction by Christie’s New York. It was purchased by Harry Winston for over US$5.5 million, setting a world auction record for price per carat for an emerald. The historic ring, designed by Raymond Yard in 1948, was previously owned by the Rockefeller family. Courtesy: Christie's
Christie's to auction the Rockefeller emerald: a potentially record-breaking stone with a prestigious provenance
By Sarah Royce-Greensill
12 MAY 2017 • 4:00PM
An 18.04-carat emerald once owned by the esteemed Rockefeller family is to be sold at auction in New York next month, with an estimate of $4-6 million (£3.1-4.7 million). Described by Christie's as "among the finest emeralds to be offered for sale at auction", if it achieves its high estimate, it will be worth more than $332,000 per carat - a potential world record for an emerald sold at auction.
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Carlos Castillo is a graduate from the prestigious Gemological Institute of America (GIA) and the University of New Orleans.