The Pink Star Diamond — Gem and Economic Object
The Pink Star Diamond — Gem and Economic Object
How a 132.5-carat South African rough became a 59.60-carat US$71.2 million benchmark for the fancy-colour market
The Pink Star is the 59.60-carat oval mixed-cut diamond, GIA Fancy Vivid Pink Internally Flawless, that holds the auction record for the highest price ever paid for any gemstone: US$71.2 million at Sotheby's Hong Kong on 4 April 2017. The stone was cut from a 132.5-carat rough recovered by De Beers in South Africa in 1999, prepared and faceted over two years by Steinmetz Diamonds, and originally known as the Steinmetz Pink. After the 2017 sale to Chow Tai Fook Enterprises it was renamed the CTF Pink Star. This article addresses the stone as an economic and trade object — how it shaped fancy-colour diamond pricing, why its record has proved durable, and what its history reveals about the structure of the very-high-end coloured-diamond market — rather than as a famous-stone biography.
The economics of fancy-colour rarity
Fancy Vivid Pink is the highest saturation grade in the GIA fancy-colour scale for pink diamonds, applied to stones whose colour reaches the upper extreme of the pink range. GIA grading records suggest that fewer than 0.01 percent of pink diamonds reaching the laboratory carry the Fancy Vivid Pink grade, and the proportion of stones above 10 carats with that grade and with Internally Flawless clarity is smaller still. The Pink Star at 59.60 carats with both grades is the largest such stone the laboratory has graded.
The economics of fancy-colour diamond pricing reflect this distribution. Per-carat prices rise non-linearly with size at the top of the saturation scale, because the supply of rough capable of yielding large stones at the highest grades is essentially fixed by the geological history of the producing localities. The Pink Star's US$1.19 million per carat figure at the 2017 sale sat below the per-carat figures achieved by smaller Fancy Vivid Pink stones — the Pink Legacy at US$2.66 million per carat, the Williamson Pink Star at approximately US$3.35 million per carat — but the absolute figure remains the highest on record.
The South African rough
The 132.5-carat rough was recovered from a De Beers operation in South Africa in 1999. The locality has not been definitively documented in public records, but the chemistry, growth structure, and inclusion suite of the cut stone are consistent with the historic pink-diamond output of the Premier (now Cullinan) mine, the source of multiple historic large pink stones including the Cullinan Heritage rough.
De Beers sold the rough to Steinmetz Diamonds, the Israeli cutting and trading firm with a long specialism in significant fancy-colour stones. Steinmetz subsequently lost a separate 2008 robbery of fancy-colour rough to the Pink Panther network, an episode that highlighted the security challenges of holding very-high-value rough at the cutting stage. The Pink Star rough was not affected by that incident.
The cutting
Steinmetz cutters worked the rough across approximately two years, with the planning phase consuming a substantial proportion of that time. The fancy-colour character of pink diamonds requires the cutter to balance conventional optical priorities — symmetry, polish, light return — against the requirement to maximise face-up colour saturation, with the orientation of the rough relative to the colour-bearing zones determining the saturation of the finished stone. The Steinmetz cutters operated at the edge of the available rough yield to preserve the Fancy Vivid Pink grade across the full size of the cut stone.
The final cut, a modified oval mixed cut of 59.60 carats, has proportions optimised for face-up colour rather than for maximum brilliance under conventional brilliant-cut criteria. Pink diamonds at this saturation level are routinely cut to slightly deeper proportions than equivalent white stones to enhance colour while accepting some loss of brilliance.
Auction history
The Pink Star has been offered at public auction twice. The 2013 Sotheby's Geneva sale closed at CHF 76.3 million (US$83.2 million) to bidder Isaac Wolf but failed at settlement, with the buyer defaulting on payment. Sotheby's took the stone onto its books at a valuation of approximately US$72 million while pursuing the failed bidder for damages. The April 2017 Sotheby's Hong Kong sale closed at HK$553 million (US$71.2 million) to Chow Tai Fook Enterprises, with settlement secured.
The 2013 default reshaped auction-house contracting practice for top-lot transactions. Subsequent significant fancy-colour sales have routinely involved substantial pre-sale guarantees, irrevocable bid arrangements, and explicit credit verification of bidding parties, all designed to reduce the risk of post-hammer settlement failure.
The CTF Pink Star and the Asian market
Chow Tai Fook's purchase of the Pink Star fits within a broader pattern of Asian institutional and family-business acquisition of significant historic stones across the 2010s. Cartier, Mouawad, Graff, and other Western houses have continued to compete at the very top of the market, but Asian purchasers — Chow Tai Fook, Lai Sun Group, Mouawad's Asian arms, Hong Kong and Greater China private collectors — have taken a growing share of the highest-priced fancy-colour transactions. The Pink Star sale represents one of the most prominent illustrations of this shift.
The CTF Pink Star has been displayed at Chow Tai Fook events and travelling exhibitions in Hong Kong, Beijing, Shanghai, Taipei, and other Asian markets since the acquisition. The stone is held within Chow Tai Fook's permanent collection and has not been offered for resale.
The Pink Star and the post-Argyle market
The November 2020 closure of the Argyle mine in Western Australia ended the principal source of new pink diamond rough for the global market, and the supply of comparable rough to that which produced the Pink Star is now constrained. The Argyle mine was responsible for an estimated 90 percent of pink diamonds entering the global trade between 1985 and 2020, although Argyle production was concentrated in smaller stones and did not regularly produce material at the Pink Star's size band. South African Cape sources, the historic origin of the Pink Star itself, continue to produce small quantities of fancy-pink rough, but stones of the Pink Star's size and saturation are not being replaced from current mining.