SourcingDec 02, 2025
Petra Diamonds Elevates Interim CEOs to Permanent StatusSourcingJan 15, 2026
Nearly 42-Carat Blue Diamond Discovered in South Africa
Petra Diamonds unearthed the 41.82-carat, Type IIb blue diamond at the Cullinan Mine.
The 41.82-carat, Type IIb blue diamond (Photo courtesy of Petra Diamonds Ltd.)
London—Petra Diamonds Ltd. has recovered a 41.82-carat blue diamond of “seemingly exceptional” color and clarity from South Africa’s famed Cullinan Mine.
Petra announced the recovery of the Type IIb diamond on Tuesday but provided few additional details.
The mining company, which recently refinanced and completed a rights issue to help it stay afloat, said it is still analyzing the stone and determining how it should be sold.
More announcements about how the diamond will be marketed will be made in due course, Petra added.
Petra Diamonds operates two diamonds mines in South Africa, Cullinan and Finsch.
The Cullinan Mine has yielded sizable blue diamonds in the past, including a collection of five weighing between 9.61 and 25.75 carats.
All discovered over the course of the same week in September 2020, Petra sold the stones to De Beers Group and Diacore in November 2020 for $40.36 million.
De Beers later incorporated them into an eight-stone collection of fancy intense and fancy vivid blue diamonds that ultimately did not perform well at auction in 2022.
Signs of weakness in the market for fancy color diamonds, which once seemed destined to keep increasing in price, have continued since then.
In November, Christie’s sold the “Mellon Blue,” a 9.51-carat fancy vivid blue, for $25.6 million, $7 million less than the diamond garnered at auction a decade ago.
Related stories will be right here …
Petra announced the recovery of the Type IIb diamond on Tuesday but provided few additional details.
The mining company, which recently refinanced and completed a rights issue to help it stay afloat, said it is still analyzing the stone and determining how it should be sold.
More announcements about how the diamond will be marketed will be made in due course, Petra added.
Petra Diamonds said it is still analyzing this 41.82-carat blue diamond unearthed at its Cullinan Mine but believes it to be of “seemingly exceptional” color and clarity. (Photo courtesy of Petra Diamonds Ltd.)
Petra Diamonds operates two diamonds mines in South Africa, Cullinan and Finsch.
The Cullinan Mine has yielded sizable blue diamonds in the past, including a collection of five weighing between 9.61 and 25.75 carats.
All discovered over the course of the same week in September 2020, Petra sold the stones to De Beers Group and Diacore in November 2020 for $40.36 million.
De Beers later incorporated them into an eight-stone collection of fancy intense and fancy vivid blue diamonds that ultimately did not perform well at auction in 2022.
Signs of weakness in the market for fancy color diamonds, which once seemed destined to keep increasing in price, have continued since then.
In November, Christie’s sold the “Mellon Blue,” a 9.51-carat fancy vivid blue, for $25.6 million, $7 million less than the diamond garnered at auction a decade ago.
Editors' Picks
Sponsored by
More on Sourcing
The Latest
IndependentsJun 05, 2026
Pennsylvania Jewelry Store To Close After 79 YearsJim Springer, owner of Dunkelberger’s Fine Jewelry, is heading into retirement.
SurveysJun 05, 2026
Consumers to Cut Back on Spending Amid Rising Prices, Survey Shows When conducting its May consumer confidence survey, The Conference Board asked extra questions about consumers’ budgeting strategies.
CollectionsJun 05, 2026
Rebel Jewelry’s Charm Symbolizes Perseverance for Pride MonthThe “Tunnel” charm, our Piece of the Week, celebrates Pride Month with its design inspired by hope and the light at the end of the tunnel.
Brought to you by
All Eyes on Gold Prices. Alternatives to Look For. And What to BEWARE of in VegasAs gold prices rise, today’s retailers are looking for alternatives at prices that will appeal to wider audiences.
AuctionsJun 04, 2026
Treasures from Maurice Tempelsman’s ‘Marvelous’ Life Head to AuctionUp for auction at Sotheby’s, the collection of Tempelsman’s personal effects includes a Cartier Tank watch Jackie O. gifted him.
Weekly QuizJun 05, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
CollectionsJun 04, 2026
Buddha Mama to Spend the Summer in AspenThe Miami-based fine jewelry brand will host its first summer residency in the Colorado mountain town from June 5 to Aug. 23.
MajorsJun 04, 2026
AGS Honors Late Peter Yantzer, Holds Time Capsule CeremonyThe organization also announced its international board of directors for the 2026-2027 term.
Brought to you by
How Modern Training Is Becoming a Competitive Advantage for Jewelry RetailersWith the trade and customer trust in mind, GIA® developed NextGem™ – on-demand training designed specifically for retail.
MajorsJun 04, 2026
Neiman Marcus’ Downtown Dallas Store to Close in SeptemberSaks Global confirmed the closure this week, spelling the end for a store that’s been part of downtown Dallas for more than 100 years.
ColumnistsJun 03, 2026
Peter Smith: When Top Talent Leaves and What It Says About YouSmith discusses how managers should handle a top performer's exit, warning that a poor response could have a lasting impact.
GradingJun 03, 2026
GIA’s Tracr Investment Is First Step Toward Industry-Owned PlatformThe Gemological Institute of America is now a 30 percent stakeholder in Tracr, the De Beers-backed blockchain for diamonds.
WatchesJun 03, 2026
The 1916 Company Taking Pre-Owned Rolexes on the Road, AgainThe retailer is bringing Rolex Certified Pre-Owned watches to five U.S. cities in 2026 for collectors to see, try on, and purchase.
IndependentsJun 03, 2026
Jessica Alba Is the New Face of Gabriel & Co.The actress and entrepreneur stars in the jeweler’s new campaign that celebrates life’s quiet moments.
TrendsJun 03, 2026
State of Design: Only the Innovative Will SurviveThe price of gold has risen, affecting the number of pieces designers make, the materials they use, and how they position themselves.
FinancialsJun 02, 2026
Signet Jewelers’ Q1 Sales Up 2% As It Focuses on ‘Core Four’ The jewelry retailer is zeroing in on Zales, Jared, Kay Jewelers, and Blue Nile as it looks to create unique brand identities for each.
WatchesJun 02, 2026
Watch Industry Veteran James Marks Joins Sotheby’sSotheby’s has appointed the former Phillips executive as its global head of private sales and retail in its watches division.
AuctionsJun 02, 2026
Sotheby’s to Auction 10-Carat Blue Diamond, 1960s Harry Winston Necklace A private collection of five Paraíba tourmalines also will be up for sale at Sotheby’s High Jewelry auction in New York, scheduled for June 16.
IndependentsJun 02, 2026
State of Retail: 6 Things Retailers Should Know About Consumers TodayFrom Gen Z’s view of luxury to “doom spending,” these are the six consumer trends to note this year.
Events & AwardsJun 01, 2026
Design Atelier Brands Have a Big Night at Emotional Couture Design AwardsThe show started by honoring Mildred Marcano, ended with a tearful Beth Anne Bonanno, and recognized a dozen-plus designers in between.
SourcingJun 01, 2026
RapNet Rebranding as Rapaport TradeThe revamped online diamond marketplace will feature pricing intelligence and data-driven tools for more efficient buying and selling.
SourcingJun 01, 2026
Gemfields’ Higher-Quality Emerald Auction Achieves $26.8MThe miner said demand for higher-quality emeralds is stable, but there is notable caution in the market.
CollectionsMay 29, 2026
Cultus Artem’s Necklace Is the Oasis in Las Vegas’ DesertThe “River of Heaven” necklace, our Piece of the Week debuting at Couture, combines 26 salt and pepper diamonds spaced by Tahitian pearls.
IndependentsMay 29, 2026
Meet the 2026 Retailer Hall of Fame InducteesThis year’s inductees include second-, third-, and fourth-generation jewelers.
Events & AwardsMay 28, 2026
JCK Announces Jesse Itzler as 2026 Keynote SpeakerThe author, speaker, and entrepreneur will give his presentation, “Spiritual Billionaire,” on Saturday morning.
Events & AwardsMay 28, 2026
JCK Rocks To Ride With NellyThree-time Grammy award-winning artist Nelly is set to perform at the annual event at Tao Beach on Sunday night.
MajorsMay 28, 2026
Signet Jewelers to Buy The Clear Cut Signet will integrate the online-only, natural diamond-focused jeweler into Blue Nile, which it wants to position as a higher-end retailer.
CollectionsMay 28, 2026
Meet The 17 Newcomers to Couture’s Design AtelierThese up-and-coming jewelry brands are bringing their distinct aesthetic and unique point-of-view to the Design Atelier for the first time.
