The Pink Star Auction Record, April 2017
The Pink Star Auction Record, April 2017
How HK$553 million at Sotheby's Hong Kong became the benchmark price for any gemstone at auction
On 4 April 2017, the 59.60-carat Pink Star diamond sold at Sotheby's Hong Kong for HK$553 million, equivalent to US$71.2 million, establishing the highest price ever paid for any gemstone at public auction. The Fancy Vivid Pink, Internally Flawless oval mixed-cut diamond was purchased by Chow Tai Fook Enterprises and renamed the CTF Pink Star. The sale eclipsed the prior gemstone auction record — the Oppenheimer Blue, sold at Christie's Geneva for US$57.5 million in May 2016 — and underscored the strength of demand for top-grade fancy-colour diamonds in the Asian luxury market. As of 2025 the Pink Star auction record stands unbroken.
The pre-sale context
The Pink Star arrived at the April 2017 Sotheby's Hong Kong Magnificent Jewels and Jadeite sale carrying both an extraordinary GIA grading specification — the largest Fancy Vivid Pink Internally Flawless diamond in the laboratory's history — and a cautious pre-sale estimate. The estimate was set at approximately US$60 million, anchored to comparable fancy-colour diamond sales of the previous five years and to the prior failed 2013 Geneva sale of the same stone for CHF 76.3 million.
The 2013 failed sale and its subsequent unwinding had reshaped Sotheby's contractual approach to top-lot transactions, with the 2017 sale conducted under arrangements designed to ensure settlement. The auction house secured an irrevocable bid commitment from at least one party in advance of the sale, providing a price floor at the lower end of the estimate range. Sotheby's stated commitment was to deliver settlement on the lot, and the auction-house economics required ensuring that a 2013-style default could not recur.
The bidding
Bidding opened in the room and was conducted in a combination of in-room paddles and telephone bids fielded by Sotheby's specialists. The bidding rose rapidly through the estimate range and continued past US$60 million in HK$ equivalents, with the field narrowing to two telephone bidders by the time bidding crossed HK$500 million. The hammer fell at HK$508 million; with the buyer's premium added, the total price was HK$553 million.
The buyer was Henry Cheng Kar-shun, chairman of Chow Tai Fook Enterprises, the parent of the Hong Kong-based Chow Tai Fook Jewellery Group, one of the largest retail jewellery chains in Asia. Chow Tai Fook had previously acquired the Cullinan Heritage rough (507 carats, 2010, US$35 million) and other significant fancy-colour and historic stones, and the Pink Star purchase fit within the company's strategy of building a permanent collection of named historic diamonds for institutional and exhibition use.
The record in context
The Pink Star sale joined a sequence of fancy-colour and named-diamond auction records achieved during the 2014 to 2017 period: the Graff Vivid Yellow (US$16.3 million, 2014), the Blue Moon of Josephine (US$48.5 million, 2015), the Oppenheimer Blue (US$57.5 million, 2016), and the Pink Star (US$71.2 million, 2017). The trajectory of these records reflected several converging factors: the rising depth of Asian collector demand for fancy-colour diamonds, the constraint on supply of top-grade rough material with the 2018 announcement of imminent Argyle mine closure, and the broader shift of high-end art and gemstone markets toward Asian buyers across the 2010s.
On a per-carat basis, the Pink Star's US$71.2 million / 59.60 carats works out to approximately US$1.19 million per carat. By comparison, the 2018 Pink Legacy at 18.96 carats sold for US$50.4 million, or approximately US$2.66 million per carat — a higher per-carat figure reflecting the rarity of large Fancy Vivid Pink stones with Internally Flawless clarity at smaller size bands. The relationship between per-carat price and stone size in fancy-colour diamonds is non-linear, with very large stones commanding lower per-carat figures than smaller stones of equivalent specification.
Aftermath
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 has not been offered for resale and is held within Chow Tai Fook's permanent collection. The 2017 auction result has become the principal reference figure for fancy-colour diamond valuation at the very top of the market, cited in subsequent auction-house catalogues, dealer marketing materials, and trade-press analyses of comparable stones.
The record has proved durable. Subsequent auction outcomes for fancy-colour diamonds — the 2022 De Beers Cullinan Blue at US$57.5 million, the 2022 Williamson Pink Star at US$57.7 million, the 2022 Eternal Pink at US$34.8 million — have approached but not surpassed the Pink Star figure. The combination of size, saturation, clarity, and timing required to match the 2017 result has not recurred in the public auction market.