FinancialsMar 10, 2026
Signet Jewelers’ Q4 Sales Fall Flat The jewelry giant released preliminary results for the fourth quarter and full year on Monday, with final results slated to come next week.
SourcingJun 25, 2018
327-Carat Diamond Sells for Nearly $31K a Carat
It was one of the lots offered in diamond mining company Lucara’s “Exceptional Stone Tender.”
Lucara Diamond Corp. found this 327.48-carat diamond at its Karowe Mine in Botswana this spring. This week, an unnamed buyer paid $10.1 million, or nearly $31,000/carat, for the stone at tender.
Vancouver, British Columbia--A 327.48-carat diamond recovered from a mine in Botswana has sold for $10.1 million, or $30,900 per carat.
It was the highest-grossing lot in a tender of exceptional diamonds mined by Lucara Diamond Corp., though its per-carat price fell well short of the per-carat world record for a diamond set by another Lucara-mined stone, the 812.77-carat Constellation. That diamond sold for nearly $78,000 per carat in May 2016.
The 327-carat stone, found by Lucara at the Karowe mine in April and described as being “top white” in color, was one of two rough diamonds weighing more than 300 carats sold as part of the company’s 12th tender of exceptional stones, the results of which were announced last week.
The other 300-carat-plus diamond included in the sale was 472.37 carats. That diamond (pictured below) was the largest in the sale and also found a buyer, though Lucara declined to provide details on its purchase price. 
All told, Lucara’s Exceptional Stone Tender totaled $32.48 million and averaged $22,356 per carat. Excluding the sale of the 472-carat diamond, which is “top light brown” as opposed to white in color, the tender’s average was $30,712 per carat.
Lucara said it sold all 10 lots it offered, and each one went for more than $1 million, with four diamonds selling for more than $3 million each.
Commenting on the sale, CEO Eira Thomas said: “Lucara is very pleased with the outcome of EST12, which was comprised of diamonds produced during 2018, including several diamonds recovered from the EM/PK(S) unit during February and April this year. The quality of Karowe’s large diamonds continues to attract the attention of the world’s foremost manufacturers and diamantaires, with 29 companies attending the sale and eight individual companies winning lots.”
Thomas took over as CEO of Lucara in February, replacing the retiring William Lamb.
Vancouver-based Lucara operates the Karowe Mine in Botswana, the mine that produced the second largest rough diamond ever found, weighing 1,109 carats. Graff Diamonds paid $53 million for the stone in September 2017.
More on Sourcing
The Latest
MajorsMar 10, 2026
Saks Global to Close 15 More StoresThe retailer also gave an update on its vendor partnerships.
TrendsMar 10, 2026
Messika Names Julianne Moore as AmbassadorThe award-winning actress is the “epitome of modern allure,” the brand said.
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.
CollectionsMar 10, 2026
Gemstones ‘Bloom’ in Sorellina’s New CollectionThe “Bloom” collection draws from the flower power movement of the 1960s and ‘70s with inlay pendants offered in eight colorways.
Weekly QuizMar 05, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
Events & AwardsMar 10, 2026
Diamond-Studded Painting Shines at RJO Foundation AuctionThe unique piece was one of the custom works offered at the foundation's recent silent art auction, which garnered nearly $15,000 in total.
TrendsMar 09, 2026
Jake Gyllenhaal Is Bulgari’s Latest AmbassadorBulgari named Gyllenhaal as its brand ambassador for his embodiment of artistic depth, intellectual curiosity, and warmth.
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.
Events & AwardsMar 09, 2026
TJS Announces 2026 Scholarship WinnersAwards were given to four students, one apprentice, and an emerging jeweler.
AuctionsMar 09, 2026
Joanna Carson’s Jewels Lead White-Glove SaleThe top jewelry lot of the late model’s estate sale, hosted by John Moran Auctioneers, was an Oscar Heyman & Brothers for Cartier necklace.
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.
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.
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.
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.
