The Graff Pink is a 24.78-carat fancy intense pink diamond of cushion cut, widely regarded as one of the most important coloured diamonds ever to appear at public auction. Graded by the Gemological Institute of America (GIA) as Type IIa — the structurally purest classification of diamond, essentially free of nitrogen impurities — the stone combines exceptional size with a depth of pink saturation that is extraordinarily rare at this scale. When it sold at Sotheby's Geneva on 16 November 2010, the hammer price of approximately US $46.16 million set a world record for the highest price achieved for a pink diamond at auction, a record that stood for several years and that continues to define the upper register of the coloured-diamond market.

Found your diamond? Our Toronto, Canada atelier will set it in an engagement ring made just for you.

Gemmological Character

At nearly 25 carats, the Graff Pink occupies a size category where fancy intense pink diamonds are, for practical purposes, unique. GIA's colour-grading scale for fancy coloured diamonds places fancy intense above fancy and below fancy vivid; the distinction matters enormously in the market, but the Graff Pink's saturation was considered by many trade observers to approach the vivid threshold in face-up appearance. The emerald cut — a rectangular step cut with cropped corners — is a demanding choice for a pink diamond: its broad, open table and parallel facet rows offer nowhere to conceal colour irregularities or inclusions, making a clean, evenly saturated stone of this cut all the more remarkable.

Type IIa classification is significant beyond mere chemistry. Diamonds in this category contain so little nitrogen that they are essentially colourless by nitrogen-related causes; the pink colour in Type IIa stones is instead attributed to plastic deformation of the crystal lattice during the stone's geological journey toward the surface, a mechanism that produces colour centres absorbing in the green portion of the visible spectrum. This structural origin of colour is inherently unpredictable and cannot be replicated by any known treatment, which is part of what makes large, naturally coloured pink diamonds of Type IIa character so coveted.

Browse loose, certified diamonds in Toronto, Canada — or book a private viewing to see them in hand.

GIA's report on the stone confirmed the colour as natural, with no indication of colour treatment. The clarity grade has not been publicly disclosed in full detail, but the stone's ability to command a per-carat price of approximately US $1.86 million implies a clarity well within the range acceptable to the most demanding collectors.

Provenance and Sale History

The Graff Pink's history prior to its 2010 sale is not fully documented in the public record. It was known to have been held for decades by a private American collector before being consigned to Sotheby's Geneva. The 2010 sale was conducted as part of Sotheby's autumn Geneva season, which has historically been one of the most important venues for significant coloured diamonds and coloured gemstones.

The buyer was Laurence Graff, the British diamantaire and founder of Graff Diamonds, who gave the stone its current name. Graff has a well-documented history of acquiring landmark diamonds at auction — a practice that simultaneously serves as a statement of connoisseurship and as a vehicle for the firm's positioning at the apex of the luxury diamond trade. Upon acquisition, the stone was recut to improve its proportions and to remove a small area of clarity concern; GIA subsequently re-examined the stone and confirmed that the colour grade of fancy intense pink was retained after recutting. The recutting itself is a notable episode: it demonstrates that even at this level of value, a skilled cutter's intervention can be judged worthwhile, and that GIA re-examination after modification is standard practice for stones of this importance.

Market Significance

The Graff Pink's auction result in 2010 was not merely a record — it was a signal. The coloured-diamond market had been ascending steadily through the 2000s, driven by the finite supply of pink diamonds from the Argyle mine in Western Australia (which closed in November 2020), growing demand from collectors in Asia, and a broader recognition among sophisticated investors that exceptional coloured diamonds represent a category of portable, durable, and highly concentrated value. The Graff Pink's price crystallised these dynamics in a single, highly publicised transaction.

The per-carat price of approximately US $1.86 million at the time of sale was itself a record for any gemstone. Subsequent years have seen other stones — including the Pink Star (59.60 carats, fancy vivid pink, sold in 2017 for US $71.2 million) — surpass the Graff Pink's absolute price, but the 2010 sale remains a foundational reference point in discussions of coloured-diamond valuation.

Several principles that the Graff Pink exemplifies are now standard in coloured-diamond market analysis:

• Size premium: The relationship between carat weight and price per carat is not linear for exceptional coloured diamonds; above certain thresholds, price per carat accelerates sharply because stones of comparable quality simply do not exist in meaningful numbers.
• Type IIa premium: The structural purity of Type IIa diamonds, combined with the natural-colour certification, commands a significant premium over Type Ia stones of nominally similar colour appearance.
• Cut premium: An emerald cut of fine proportions in a large pink diamond is rarer than a comparable round brilliant or cushion cut, because the step-cut geometry is less forgiving and because cutters historically preferred shapes that maximise colour saturation.
• Provenance and name recognition: Stones that have passed through the hands of major collectors or major maisons, and that carry an established name, consistently achieve premiums at resale.

The Argyle Context

Any discussion of large fancy pink diamonds must acknowledge the Argyle mine in the East Kimberley region of Western Australia, operated by Rio Tinto until its closure in 2020. Argyle was responsible for the vast majority of the world's supply of pink diamonds by volume, though the stones it produced were predominantly small and of lighter saturation. The rare, larger, more intensely coloured pinks — the category to which the Graff Pink belongs — came from Argyle in very limited numbers and from a handful of other sources, including Brazil and certain African localities. With Argyle's closure, the already constrained pipeline of new large pink diamonds has effectively ceased, reinforcing the investment logic that underpinned the Graff Pink's 2010 valuation and that continues to support prices for comparable stones.

Dreaming of a custom diamond engagement ring? Our Toronto, Canada workshop builds it around a diamond you choose.

Legacy

The Graff Pink occupies a position in the coloured-diamond canon comparable to that of the Hope Diamond in the blue-diamond category or the Mogok pigeon-blood ruby in the coloured-gemstone world more broadly: it is a stone whose specific characteristics — weight, colour, clarity, cut, and documented history — combine to make it a reference object rather than merely a valuable one. Gemmologists, auction specialists, and collectors cite it when establishing benchmarks for the fancy intense pink category at significant size. Its 2010 sale price remains one of the most frequently quoted figures in the literature of the coloured-diamond market, and the episode of post-purchase recutting followed by GIA re-examination has become a case study in the responsible stewardship of important stones.