The Rockefeller Emerald — Benchmark Per-Carat Auction Record
The Rockefeller Emerald — Benchmark Per-Carat Auction Record
An 18.04-carat Colombian step-cut that set the price-per-carat ceiling in 2017
The Rockefeller Emerald is an 18.04-carat rectangular step-cut Colombian emerald that, on 20 June 2017 at Christie's New York, sold for US$5,511,500, or approximately $305,000 per carat, setting the world auction record for price per carat for emerald. The stone was originally part of an emerald-and-diamond brooch acquired in 1930 by John D. Rockefeller Jr. and was subsequently divided among his heirs. The single-stone history, the cutting quality, and the laboratory-confirmed Colombian origin combined to produce one of the most decisive demonstrations of provenance premium in the modern coloured-stone market.
Provenance and ownership history
John D. Rockefeller Jr. purchased the original emerald-and-diamond brooch from Van Cleef & Arpels in 1930. The brooch, set with a series of large Colombian emeralds, passed to his son David Rockefeller and his daughter-in-law Peggy Rockefeller, who later had the brooch dismantled and the principal emeralds reset into individual jewels by Raymond Yard, the New York jeweller closely associated with the Rockefeller family. The 18.04-carat stone became the centrepiece of a ring.
The 2017 Christie's sale catalogued the stone with its Rockefeller provenance and described it as one of the finest American-held Colombian emeralds in private hands. Christie's reported the buyer as the New York jeweller Harry Winston Inc., which subsequently named the stone The Rockefeller-Winston Emerald.
Stone characteristics
The Rockefeller Emerald weighs 18.04 carats and is cut as a rectangular step cut — the classical "emerald cut" that the species itself names. The stone's colour is described in laboratory documentation as a saturated, slightly bluish green of the type associated with the finest Muzo material from the western emerald belt of Boyacá department, Colombia. Clarity is exceptional for the species and origin: the laboratory documentation reports only minor clarity enhancement, a remarkable characterisation given the typical reliance on cedarwood oil and synthetic-resin filling in commercial Colombian emerald.
Multiple laboratory reports accompanied the lot, confirming Colombian origin and the F1 (insignificant) treatment level under the AGTA-coordinated emerald clarity-enhancement scale. The combination of high colour, exceptional clarity, and minimal treatment in a Colombian stone of this size is statistically rare, and the auction result reflected that rarity.
Why the price-per-carat record matters
Auction records for emerald are most often quoted at the per-carat level rather than the lot level because emerald valuations vary so dramatically with size, colour, clarity, and treatment that direct lot comparisons are uninformative. The Rockefeller Emerald's $305,000 per carat figure displaced the previous emerald per-carat record and established a new ceiling that subsequent stones have been measured against. The result also confirmed that the trade and the auction market continue to recognise a substantial provenance premium for stones with documented historical American ownership.
The result is read in the trade as a benchmark for top-tier Colombian emerald with minimal treatment. Stones of similar size and colour with more typical moderate or significant clarity enhancement trade at fractions of the Rockefeller per-carat figure.
Position in the broader Colombian emerald market
Colombian emerald is the historically dominant origin in the species and remains the reference for the highest-grade material. Within Colombia, the western belt deposits — Muzo, Coscuez, La Pita — are the source of the velvety, slightly bluish-green colour that defines the top of the market. The Rockefeller Emerald is consistent with this character. Trapiche, Chivor, and other Colombian sources produce excellent stones of distinct character but are not what is typically meant by the "Muzo type" colour.
In the trade
The Rockefeller Emerald is the type of stone the trade points to when discussing the upper bound of the market: large, exceptionally fine in colour and clarity, minimally treated, Colombian, and provenanced. Buyers and consignors evaluating very fine emeralds use the Rockefeller result as a reference point for the top of the per-carat distribution. See also Colombian emerald, Muzo, F1 minor enhancement.