Oppenheimer Blue — A 14.62-Carat Fancy Vivid Blue Diamond
Oppenheimer Blue — A 14.62-Carat Fancy Vivid Blue Diamond
The 14.62-carat rectangular-cut Fancy Vivid Blue diamond that sold for US$57.5 million at Christie's Geneva in May 2016
The Oppenheimer Blue is a 14.62-carat rectangular-cut diamond graded Fancy Vivid Blue by GIA, sold at Christie's Geneva in May 2016 for US$57.5 million, setting a then-record price for any blue diamond at auction. Named after its previous owner Sir Philip Oppenheimer (1911–1995) — a member of the Oppenheimer family historically associated with De Beers — the stone achieved approximately US$3.93 million per carat at the hammer. The sale underscored the exceptional rarity and market demand for large, intensely coloured blue diamonds, which derive their hue from trace boron in the diamond lattice rather than from the typical nitrogen-related colour mechanisms that produce yellow and brown diamonds.
Stone characteristics
The Oppenheimer Blue's GIA grading report identifies the stone as Fancy Vivid Blue — the highest saturation grade GIA assigns for blue diamonds — with a rectangular emerald-cut shape that displays the depth of colour through both the table and the steps of the pavilion. Fancy Vivid Blue is a designation reserved for diamonds whose colour saturation, tone, and hue meet the strictest GIA criteria for blue colour. Stones above 10 carats in this grade are extraordinarily scarce, and the auction value reflects both the size and the colour grade.
Type IIb classification — the diamond type in which boron impurities produce the blue colour — is associated with most natural blue diamonds. The Oppenheimer Blue is a Type IIb stone, and the boron content also gives the diamond electrical semiconducting properties that distinguish Type IIb from the more common Type Ia and Type IIa diamonds.
Provenance
The stone was previously held by Sir Philip Oppenheimer, a senior figure in the Oppenheimer family that controlled De Beers across much of the twentieth century. Philip Oppenheimer was a cousin of Sir Ernest Oppenheimer (the founder figure of the modern De Beers organisation) and held senior positions in the company. The stone's provenance through this family connection was a significant element of its auction marketing, providing both historical interest and the specific association with the diamond industry that gives the piece an additional dimension of significance.
The auction at Christie's Geneva was part of the firm's Magnificent Jewels sale on 18 May 2016. The hammer price of US$57.5 million made the stone the most expensive jewel sold at auction at that time, although subsequent sales — including the Pink Star at US$71.2 million in April 2017 — have exceeded this record.
The blue diamond market
Natural blue diamonds are among the rarest of all coloured diamonds. The Cullinan mine in South Africa is the principal historical source of fine blue diamonds, including the Hope Diamond (45.52 carats, Smithsonian Institution), the Wittelsbach-Graff (31.06 carats), the Heart of Eternity (27.64 carats), and many of the major modern blue diamonds at auction. Some Indian and Australian production has also yielded significant blue stones. Production is small enough that any blue diamond above 10 carats with a Fancy Vivid grade represents a generational rarity.
The market for top-colour blue diamonds has been driven principally by Asian, Middle Eastern, and high-net-worth Western collectors, with private buyers and family offices typically the underbidders at the major auction outcomes. The pattern of sustained price growth across successive auction records reflects both supply scarcity and growing demand for investment-grade coloured diamonds.
In the trade
The Oppenheimer Blue's sale in 2016 set a benchmark for subsequent fancy-coloured diamond auctions and remains a frequently cited reference in coloured-diamond market commentary. The combination of size, top colour grade, family provenance, and the international auction setting made the sale a landmark event in twentieth-century jewellery commerce. See also Hope Diamond, Wittelsbach-Graff, Pink Star, and the broader fancy coloured diamond entries for related material.