World Diamond Day: The Most Valuable Diamonds Ever Sold at Auction

In recognition of World Diamond Day, we reflect on some of the most extraordinary diamonds ever offered at auction stones that not only achieved record-breaking prices but also represent the pinnacle of rarity, craftsmanship, and natural beauty.

Established by the Natural Diamond Council, World Diamond Day celebrates the enduring significance of natural diamonds, highlighting their provenance, emotional value, and the moments they commemorate. It is also an opportunity to examine the exceptional stones that continue to define the upper limits of the global diamond market.

Below is a selection of some of the most important diamonds ever sold at auction.

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The CTF Pink Star

The CTF Pink Star remains the most expensive diamond ever sold at auction. This 59.60 carat oval-shaped, fancy vivid pink diamond achieved US$71.2 million at Sotheby’s Hong Kong in 2017.

Internally flawless and cut from a 132.5 carat rough discovered in 1999, the stone required over two years of meticulous planning and craftsmanship to realise its final form. It was acquired by Chow Tai Fook, setting a benchmark for coloured diamonds globally.

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The Williamson Pink Star

Achieving US$57.7 million in 2022, this 11.15 carat cushion-cut fancy vivid pink diamond is among the finest ever graded.

Originating from a 32.32 carat rough from Tanzania’s Williamson mine, it was classified as internally flawless by the Gemological Institute of America, placing it among the rarest gemstones known.

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The Oppenheimer Blue

This 14.62 carat emerald-cut vivid blue diamond sold for US$57.5 million at Christie’s Geneva in 2016.

Named after its former owner, Sir Philip Oppenheimer, the diamond drew intense global attention and was ultimately secured after a competitive international bidding process.

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The Blue Moon of Josephine

Cut from a 29.62 carat rough discovered in South Africa in 2014, this 12.03 carat fancy vivid blue diamond achieved US$48.4 million at Sotheby’s Hong Kong in 2015.

Purchased by Hong Kong collector Joseph Lau, it was renamed in honour of his daughter, further cementing its place in modern diamond history.

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The Graff Pink

This 24.78 carat fancy intense pink diamond sold for over US$46 million at Sotheby’s Geneva in 2010.

Acquired by Laurence Graff, the stone had not appeared on the market for more than 60 years prior to its sale, adding to its provenance and desirability.

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The Princie Diamond

Selling for US$39.3 million at Christie’s New York in 2013, the Princie Diamond carries remarkable historical significance.

Originating from India’s famed Golconda mines and once owned by the Nizams of Hyderabad, the diamond reflects the rich heritage of some of the world’s most celebrated diamond sources.

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The The Orange

Weighing 14.82 carats, this pear-shaped fancy vivid orange diamond remains the largest of its kind ever recorded.

It achieved US$35.5 million at Christie’s Geneva in 2013, significantly exceeding pre-sale expectations and reinforcing the rarity of orange diamonds.

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The Magnificent Oval Diamond

One of the largest D-colour flawless diamonds ever to appear at auction, this 118.28 carat oval-cut stone sold for US$30.8 million at Sotheby’s Hong Kong in 2013.

Its exceptional colour and clarity grading underscore the importance of strict laboratory standards in determining value—an area where independent certification remains critical.

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A Reflection on Rarity and Value

These diamonds are more than record-breaking assets—they are geological miracles shaped over billions of years and refined through exceptional human skill. Their value lies not only in carat weight or colour grading, but in rarity, provenance, and the precision of their cutting and certification.

As World Diamond Day highlights, natural diamonds continue to occupy a unique position in both the luxury and investment landscape. For laboratories such as the Diamond Certification Laboratory of Australia, the role of accurate and independent grading remains fundamental in preserving confidence and transparency within the global diamond market.

Source: DCLA

Sparkling Orange-Yellow Diamond Earrings Could Fetch $12 Million At Christie’s Auction

A pair of fancy vivid orange-yellow diamond earrings weighing 12.20 and 11.96 carats will be the top lot at Christie’s Magnificent Jewels sale on December 6 in New York. The earrings, which are named “California Sunset Diamonds,” are estimated at $7 million – $12 million.

A ring with a similar fancy vivid yellowish orange diamond weighing 5.16 carats has an estimate of $1.5 million – $2 million.

A 5.16-carat fancy vivid yellowish orange diamond has an estimate of $1.5 million – $2 million CHRISTIE’S

There haven’t been many details released yet for Christie’s final jewelry auction of 2023, but the sale will include several fancy colored diamonds, white diamonds and colored gems. As always, there will be signed jewels from important collections.

Source: DCLA

How rare are fancy coloured diamonds and will the price increase

Argyle pink diamonds are extremely rare and highly sought-after, making them some of the most valuable diamonds in the world. The Argyle diamond mine in Western Australia is the primary source of pink diamonds, and it is estimated that only 0.01% of the diamonds recovered from the mine are pink in colour, with an even smaller percentage being of the highest quality.

The Argyle mine ceased operations in 2020, which has led to speculation that the prices of pink diamonds, including argyle pink diamonds, may increase in the coming years. With the mine no longer producing new stones, the limited supply of these rare diamonds is expected to drive up demand and prices. However, like any investment, it’s important to carefully consider market trends and consult with a qualified professional before making any decisions.

The largest pink argyle diamond found to date is the Argyle Pink Jubilee, which was discovered at the Argyle mine in Western Australia in 2011. The diamond weighs 12.76 carats and is a vivid pink colour, making it one of the largest and most valuable pink diamonds ever found. The Pink Jubilee was cut and polished over a period of ten months, during which time the rough diamond was studied and analyzed extensively to determine the best way to bring out its natural beauty and maximize its value. The diamond was sold at auction in 2013 for an undisclosed sum, but it is believed to have fetched a record-breaking price per carat for a pink diamond.

Red diamonds are extremely rare, even more so than pink diamonds. It is estimated that only a handful of natural red diamonds are found each year, and most of them are less than half a carat in size. Red diamonds are so rare that many jewelers and gemologists may go their entire careers without ever seeing one.

The red colour in diamonds is caused by the presence of a rare mineral which causes “graining,”, This occurs when the crystal structure of the diamond is distorted during its formation. The graining causes the diamond to absorb green light and reflect red light, resulting in a beautiful and distinctive red hue.
Because of their rarity, red diamonds are among the most valuable and expensive gemstones in the world. They are highly sought-after by collectors and investors, and prices for top-quality stones can reach millions of dollars per carat at auction.

Blue diamonds are also quite rare, but not as rare as pink or red diamonds. Blue diamonds account for only about 0.02% of all diamonds mined worldwide. The blue colour in diamonds is caused by the presence of trace amounts of boron during their formation, which causes the diamond to absorb red, yellow, and green light, resulting in a blue hue.

Blue diamonds are highly prized for their unique colour and rarity, and they can command very high prices at auction. The value of a blue diamond depends on a variety of factors, including its size, colour intensity, clarity, and overall quality. Blue diamonds range in colour from pale blue to vivid blue, with the most valuable stones being those with a deep, rich blue colour.

One of the most famous blue diamonds is the Hope Diamond, which is a 45.52-carat blue diamond that is part of the Smithsonian Institution’s collection of natural history specimens.

The most expensive diamond ever sold is the Pink Star, a 59.60-carat oval-cut pink diamond that was sold for $71.2 million at a Sotheby’s auction in Hong Kong in 2017. The diamond, which is the largest internally flawless fancy vivid pink diamond ever graded by the Gemological Institute of America (GIA), was mined in Africa in 1999 and took two years to cut and polish.

The Pink Star was originally sold at auction in 2013 for a record-breaking $83 million, but the sale was later cancelled after the buyer defaulted on the payment. The diamond was put back up for auction in 2017 and sold to a jewelry retailer in Hong Kong for $71.2 million, setting a new world record for the most expensive diamond ever sold at auction.

Yellow diamonds are not as rare as pink, red, or blue diamonds, but they are still considered rare and highly prized. Yellow diamonds are formed when nitrogen atoms are trapped in the crystal lattice structure of the diamond during its formation, causing it to absorb blue light and reflect yellow light.

The intensity of the yellow colour in a diamond can vary widely, ranging from a pale yellow or light lemon colour to a deep, intense yellow. The most valuable yellow diamonds are those with a deep, rich colour that is evenly distributed throughout the stone.

Yellow diamonds are mined in various parts of the world, including South Africa, Australia, and Canada. While yellow diamonds are not as rare as some other coloured diamonds, high-quality yellow diamonds can still command very high prices at auction, especially those with a large carat weight and intense colour.

Orange diamonds are considered rare and highly valuable. The orange colour in diamonds is caused by the presence of nitrogen and other impurities in the crystal lattice structure of the diamond, which absorb blue and green light, resulting in an orange hue.

Orange diamonds can range in colour from pale orange to a deep, vivid orange, with the most valuable stones being those with a pure and intense colour. Orange diamonds are not as commonly found as white or yellow diamonds and are considered much rarer than brown or gray diamonds.

The most famous orange diamond is the Pumpkin Diamond, a 5.54-carat fancy vivid orange diamond that was mined in South Africa. The Pumpkin Diamond was sold at auction in 1997 for over $1.3 million, and it is now part of the collection at the Smithsonian Institution’s National Museum of Natural History in Washington, D.C.

Source: Michael Cohen DCLA

Fancy Colour Diamond Trio Fetches $8M at Christie’s

 

Three rings featuring diamonds with fancy-vivid color stole the show at the Christie’s Magnificent Jewels auction, selling for more than $8 million combined.

The trio of jewels, called the Perfect Palette, achieved a total of $8.4 million at the New York sale, Christie’s said Tuesday. A 2.17-carat, fancy-vivid-purplish-pink diamond ring brought in $3.5 million, beating its $2.5 million high estimate, while a 2.13-carat, fancy-vivid-blue diamond ring sold for $2.7 million, toward the upper end of its valuation. The third — a 2.34-carat, fancy-vivid-orange diamond ring — went for $2.2 million, just under its top estimate at the April 13 sale. The entire auction garnered $35 million, with 94% of items on offer finding buyers.

Another high earner was a pear brilliant-cut, 38.04-carat, D-flawless, type IIa diamond ring, which fetched $3 million. A Burmese ruby ring by F.J. Cooper, a prominent Philadelphia jeweler, went for $1.7 million. Both pieces fell within their presale estimates.

Other notable items included an oval modified brilliant-cut, 25.55-carat, fancy-vivid-yellow, VS1-clarity diamond ring, which sold for $1.7 million, smashing its $1.2 million high estimate. An emerald-cut, 14.50-carat, D-color, internally flawless, type IIa diamond ring also shattered its $1 million upper valuation, selling for $1.4 million at the auction.

A diamond and onyx Serpenti wristwatch, donated by Bulgari, fetched $50,000, within estimates. Proceeds from the timepiece will benefit the Elizabeth Taylor AIDS Foundation.

Participants at the sale originated from 40 countries across five continents, Christie’s noted. The auction house is still holding its Online Jewels sale, which began on April 8 and will run through April 20. It features a selection of items from Bulgari, Cartier and Elsa Peretti for Tiffany & Co., among others.

Source: DCLA

Fancy Colour Diamond Trio Fetches $8M at Christie’s

 

Three rings featuring diamonds with fancy-vivid color stole the show at the Christie’s Magnificent Jewels auction, selling for more than $8 million combined.

The trio of jewels, called the Perfect Palette, achieved a total of $8.4 million at the New York sale, Christie’s said Tuesday. A 2.17-carat, fancy-vivid-purplish-pink diamond ring brought in $3.5 million, beating its $2.5 million high estimate, while a 2.13-carat, fancy-vivid-blue diamond ring sold for $2.7 million, toward the upper end of its valuation. The third — a 2.34-carat, fancy-vivid-orange diamond ring — went for $2.2 million, just under its top estimate at the April 13 sale. The entire auction garnered $35 million, with 94% of items on offer finding buyers.

Another high earner was a pear brilliant-cut, 38.04-carat, D-flawless, type IIa diamond ring, which fetched $3 million. A Burmese ruby ring by F.J. Cooper, a prominent Philadelphia jeweler, went for $1.7 million. Both pieces fell within their presale estimates.

Other notable items included an oval modified brilliant-cut, 25.55-carat, fancy-vivid-yellow, VS1-clarity diamond ring, which sold for $1.7 million, smashing its $1.2 million high estimate. An emerald-cut, 14.50-carat, D-color, internally flawless, type IIa diamond ring also shattered its $1 million upper valuation, selling for $1.4 million at the auction.

A diamond and onyx Serpenti wristwatch, donated by Bulgari, fetched $50,000, within estimates. Proceeds from the timepiece will benefit the Elizabeth Taylor AIDS Foundation.

Participants at the sale originated from 40 countries across five continents, Christie’s noted. The auction house is still holding its Online Jewels sale, which began on April 8 and will run through April 20. It features a selection of items from Bulgari, Cartier and Elsa Peretti for Tiffany & Co., among others.

Source: DCLA