AuctionsAug 30, 2022
A Rare Red Diamond Is Heading to AuctionAuctionsAug 31, 2022
11-Carat Pink Diamond from Tanzania Expected to Sell for $21M+
Named the “Williamson Pink Star,” it is the second largest internally flawless fancy vivid pink ever to appear at auction.
Sotheby’s will offer the “Williamson Pink Star” diamond as a standalone lot during its Oct. 5 art auction in Hong Kong. The diamond was named in homage to two other famous pink diamonds—the record-setting “CTF Pink Star” and the 23.60-carat brilliant cut “Williamson” gifted to Queen Elizabeth II in 1947. (Photo courtesy of Sotheby’s)
London—Today in London, Sotheby’s unveiled an 11-carat fancy vivid pink diamond expected to sell for upwards of $20 million in a single-lot auction in October.
Dubbed the “Williamson Pink Star,” the diamond is the product of a 32-carat rough stone unearthed at the Williamson mine in Mwadui, Tanzania, the country’s only major diamond mine that is known for its “bubble-gum pink” stones.
Diacore bought the diamond for $13.8 million, or about $427,000 per carat, from mine operator Petra Diamonds in December 2021. At the time, Diacore Chairman Nir Livnat described it as a “rare masterpiece of nature.”
The company, which has cut a number of high-profile blue diamonds including the “CTF Pink Star” and the “De Beers Cullinan Blue Diamond,” was able to craft the 32.32-carat chunk of rough into a 11.15-carat internally flawless cushion-cut diamond that is graded fancy vivid pink.
Sotheby’s said it is the second largest IF fancy vivid pink diamond ever to appear to auction.
The largest is the 59.60-carat CTF Pink Star, so named by its purchaser, Chow Tai Fook. The Chinese jewelry giant paid $71.2 million for the diamond in April 2017, and it remains the most expensive diamond, colored gemstone or jewel ever sold at auction.
The 32.32-carat rough diamond that became the “Williamson Pink Star” diamond. Diacore purchased this stone from mining company Petra in December 2021 at what was the Williamson mine’s first tender following the initial COVID shutdowns.
Diacore crafted the rough into a cushion-cut internally flawless fancy vivid pink diamond weighing 11.15 carats. (Photo courtesy of Sotheby’s)
In its current 18-karat gold setting, the diamond is flanked by trapeze-cut diamonds and brilliant-cut pink melee. It’s estimated to sell for $21 million or more. (Photo courtesy of Sotheby’s)
Sotheby’s estimates the Williamson Pink Star, which is less than a quarter of the size of the CTF Pink Star, will sell for less overall—$21 million—but the auction house says it has the potential to set a new price-per-carat record for a fancy vivid pink.
The “Winston Pink Legacy” currently holds that record at $2.7 million per carat.
Wenhao Yu, chairman of jewelry and watches for Sotheby’s Asia, told National Jeweler in an interview Tuesday that the estimated hammer price for the Williamson Pink Star reflects both the quality of the diamond and the current market, where pink diamonds, particularly larger ones, are sought after.
He said gemstones like the Williamson Pink Star continue to hold their value because of their beauty, rarity and durability, even as NFTs gain steam as alternative investment vehicles and more companies that deal in luxury goods—Sotheby’s included—embrace them.
He pointed to the “great” sale of the De Beers Cullinan Blue Diamond in April, $57.5 million against an estimate of $48 million, and the auction house’s overall growth in jewelry sales as evidence.
“This kind of rarity still holds value, especially the natural pieces from the earth,” Yu said.
Sotheby’s will offer the Williamson Pink Star in a single-lot auction in Hong Kong on Oct. 5. Prior to the sale, the auction house will take the diamond to Dubai, Singapore, Taipei and Hong Kong.
While the nearly 60-carat CTF Pink was snapped up by a large company, the Williamson Pink Star is much more wearable at 11 carats—it is, as Yu put it, a “very nice size to wear as a ring”—and could find a home with a private collector.
“There are a lot of gemstone collectors who are looking for something exceptional, and I think this qualifies.”
He also noted the diamond’s positioning at auction—not as the top lot in a larger jewelry sale but on its own, between Sotheby’s auctions of modern and contemporary art that same day.
“We consider this a true piece of art from Mother Nature,” Yu said. “It could be attractive to collectors of fine art.”
More on Auctions
The Latest
GradingMar 06, 2026
Tom Moses Leaving GIA After Nearly 50 YearsMoses, who started at GIA’s Santa Monica lab in 1976, will leave the Gemological Institute of America in May.
Lab-GrownMar 06, 2026
Charles & Colvard Files for Bankruptcy, Citing Price PressuresIncreased competition, falling lab-grown diamond and moissanite prices, and the rising cost of gold took a toll on the moissanite maker.
CollectionsMar 06, 2026
Zome’s ‘Solara’ Earrings Embody Celestial BeautyThe earrings, our Piece of the Week, feature pink tourmalines as planets orbiting around an aquamarine center set in 18-karat rose gold.
Brought to you by
Is This You? Every Jeweler Has This Problem; We Have the Solution.Every jeweler faces the same challenge: helping customers protect what they love. Here’s the solution designed for today’s jewelry business.
MajorsMar 06, 2026
Pomellato’s 2026 IWD Campaign Spotlights Economic Abuse“The Price of Freedom” campaign video for International Women’s Day confronts the quiet violence of financial control.
Weekly QuizMar 05, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
Policies & IssuesMar 05, 2026
Tariffs to Increase to 15% This Week, Treasury Secretary Says Also, a federal judge has ordered that companies that paid tariffs implemented under the IEEPA are entitled to refunds.
CollectionsMar 05, 2026
Common Era Honors ‘Difficult Women’ in CollectionThe ever-growing collection, which just expanded with the addition of Olga of Kyiv, features cameos of 12 women from history.
Brought to you by
DCA Enters a New Chapter in Jewelry EducationWith refreshed branding, a new website, updated courses, and a pathway for growth, DCA is dedicated to supporting retail staff development.
TrendsMar 05, 2026
Engagement Ring Trends 2026: What’s In, and WhyWe asked a jewelry historian, designer, bridal director, and wedding expert what’s trending in engagement rings. Here’s what they said.
Events & AwardsMar 05, 2026
AGS Announces Conclave 2026 Speaker LineupThe annual event will be held in Orlando, Florida, from Sept. 14-17.
TrendsMar 05, 2026
Caitríona Balfe Fronts Only Natural Diamonds CoverThe “Outlander” star modeled for the digital cover of the magazine’s spring issue, which features a story on her relationship with jewelry.
MajorsMar 05, 2026
Registration Opens for CIBJO Centenary CongressThis year’s annual congress, which will mark the confederation’s 100th anniversary, will take place this fall in Italy.
MajorsMar 04, 2026
Michael M Opens First StoreBeverly Hills was chosen as the location for the brand’s first store, designed as a “private residence for modern monarchs.”
Policies & IssuesMar 04, 2026
Luxury Brands Temporarily Shutter Middle East StoresKering, Apple, and other retailers have reportedly temporarily closed stores in the Middle East region in light of the recent conflicts.
EditorsMar 04, 2026
Q&A: Brilliant Earth’s CEO on the New Beverly Hills StoreBeth Gerstein discusses the vibe of the new store, what customers want when fine jewelry shopping today, and the details of “Date Night.”
Events & AwardsMar 04, 2026
JIS Miami Spring Show to Feature New Gifts Pavilion, Pop-Up Trends TalksNearly half of buyers are prioritizing silver and fashion collections this season, organizers said.
TrendsMar 04, 2026
Spinelli Kilcollin Rides Free In Year of the Horse CampaignThe “Live Now. Polish Later.” campaign features equestrians wearing the brand’s jewels while galloping across the icy plains of Kazakhstan.
MajorsMar 04, 2026
LeachGarner Names New Brand DirectorThe precious metals provider has promoted Jennifer Ashworth to the role.
Events & AwardsMar 03, 2026
Johnny Nelson Wins David Yurman Gem Awards GrantNelson will be honored as the inaugural grant winner at the Gem Awards gala on March 13.
SourcingMar 03, 2026
7 Trends That Could Define the Diamond Industry’s FutureExperts from India weigh in the politics, policies, and market dynamics for diamantaires to monitor in 2026 and beyond.
MajorsMar 03, 2026
Swiss Refiner Completes Acquisition of Gannon & ScottThe American precious metals refiner’s day-to-day operations remain the same post-acquisition.
TrendsMar 03, 2026
Amanda’s Style File: AquatopiaThese aquamarine jewels channel the calming energy of the March birthstone.
Events & AwardsMar 03, 2026
AGTA Adds Another New Category for SpectrumThe “Innovative Design” category and award will debut in the Spectrum division of this year’s AGTA Spectrum & Cutting Edge Awards.
EditorsMar 02, 2026
Jewelry at the Actor Awards: Reimagining Hollywood GlamourDiamond jewelry was the star of the event formerly known as the SAG Awards.
SurveysMar 02, 2026
Consumer Confidence Edges Up in FebruaryConsumers were somewhat less worried about the future, though concerns about rising prices and politics remained.
Events & AwardsMar 02, 2026
JVC to Honor Rebecca Foerster at Annual LuncheonFoerster is this year’s Stanley Schechter Award recipient.
Events & AwardsMar 02, 2026
JFC Names 2026 ‘Facets’ Honorees Sponsorships and tickets to the annual fundraising event, set for May 31, are available now.
