MajorsNov 10, 2025
Jewelers Focus on Love, Joy In 2025 Holiday Campaigns Tiffany & Co., David Yurman, and Pandora have launched holiday campaigns depicting their jewelry as symbols of affection and happiness.
SourcingJun 07, 2016
Sotheby’s Finds 2 Partners for 60-Carat Pink Diamond
Diacore and Mellen Inc. have formed a partnership with the auction house to acquire an ownership interest in the 59.60-carat diamond known as the Pink Star.
The 59.60-carat Pink Star diamond has been in Sotheby’s inventory since 2013, when a diamond cutter bought the stone for $83.2 million but then defaulted on the payment.
Geneva--Diacore and Mellen Inc. have formed a partnership with Sotheby’s to acquire an ownership interest in the 59.60-carat Pink Star diamond.
“The three parties have formally partnered to achieve the value of the 59.60-carat stone, which Sotheby’s holds in its inventory,” the auction house said in a brief statement, declining to comment on the specific percentage of the stone owned by each entity.
The stone could be sold in the future, either privately or at auction, with proceeds split among the three companies per their ownership percentage, according to a Sotheby’s spokesman.
The stone is the largest internally flawless, fancy vivid pink diamond that the Gemological Institute of America has ever graded.
De Beers unearthed the 132.5-carat piece of rough that became the Pink Star in 1999 in South Africa.
Sotheby’s auctioned the polished diamond in November 2013, when it sold for $83.2 million, beating out the Graff Pink to become, at the time, the most expensive gemstone ever sold at auction.
New York diamond cutter Isaac Wolf bought the diamond but, according to Forbes, he defaulted on the payment and the stone was put into Sotheby’s inventory. The auction house reportedly had to buy the Pink Star for $60 million, the price it guaranteed the original seller.
Diacor is a multinational company with interests ranging from manufacturing to retail, and specializes in the creation of large, fancy colored and rare stones.
The firm is responsible for cutting some of the world’s most famous diamonds, including the 203.04-carat De Beers Millennium Star; the Heart of Eternity, a 27.64-carat fancy vivid blue, heart-shaped diamond; and the Pink Star.
Mellen, a family-run organization based in New York, is one of the top sources for exceptional stones.
More on Sourcing
The Latest
SurveysNov 10, 2025
5 Things Retailers Should Know About Holiday Shoppers This YearThe National Retail Federation is bullish on the holidays, forecasting retail sales to exceed $1 trillion this year.
AuctionsNov 10, 2025
300+ Colored Diamonds Up for Auction at Christie’sLate collector Eddy Elzas assembled “The Rainbow Collection,” which is offered as a single lot and estimated to fetch up to $3 million.
Brought to you by
Roseco Releases New Full-Line CatalogRoseco’s 704-page catalog showcases new lab-grown diamonds, findings, tools & more—available in print or interactive digital editions.
EditorsNov 07, 2025
Piece of the Week: An MVP’s Sapphire Tennis Necklace At the 2025 World Series, the Los Angeles Dodgers’ Yoshinobu Yamamoto sported a custom necklace made by California retailer Happy Jewelers.
Weekly QuizNov 06, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
IndependentsNov 07, 2025
Foundrae’s New Palm Beach Location Is a ‘Golden Solarium’The brand’s seventh location combines Foundrae’s symbolic vocabulary with motifs from Florida’s natural surroundings.
FinancialsNov 07, 2025
Watches of Switzerland’s H1 Sales Up 8%The retailer also shared an update on the impact of tariffs on watch customers.
Brought to you by
Jewelers of America Aligns New Mission to Create Meaningful Impact for MembersFrom educational programs, advocacy, and recent MJSA affiliation, Jewelers of America drives progress that elevates businesses of all sizes.
IndependentsNov 06, 2025
Greenwich St. Jewelers Hosts Raffle Supporting Food RescueAll proceeds from the G. St x Jewel Boxing raffle will go to City Harvest, which works to end hunger in New York City.
IndependentsNov 06, 2025
Cornell’s Jewelers Names New PresidentCourtney Cornell is part of the third generation to lead the Rochester, New York-based jeweler.
WatchesNov 05, 2025
Shinola President Steps Down Just as He Starts Former Signet CEO Mark Light will remain president of Shinola until a replacement for Ulrich Wohn is found.
AuctionsNov 05, 2025
Taylor Swift’s Engagement Ring Designer Makes Her Auction DebutKindred Lubeck of Artifex has three rings she designed with Anup Jogani in Sotheby’s upcoming Gem Drop sale.
FinancialsNov 05, 2025
Pandora Posts Modest Q3 Sales Growth Amid ‘Weak’ Consumer Sentiment The company focused on marketing in the third quarter and introduced two new charm collections, “Pandora Talisman” and “Pandora Minis.”
FinancialsNov 05, 2025
Brilliant Earth’s Q3 Sales Climb 10%The jewelry retailer raised its full-year guidance, with CFO Jeff Kuo describing the company as “very well positioned” for the holidays.
Policies & IssuesNov 04, 2025
Supreme Court to Hear Tariffs Case WednesdayAhead of the hearing, two industry organizations co-signed an amicus brief urging the court to declare Trump’s tariffs unlawful.
MajorsNov 04, 2025
Danny Clark to Become Stuller CEO, Succeeding Matt StullerStuller COO Belit Myers will take on the additional role of president, with all changes effective at the start of 2026.
ColumnistsNov 04, 2025
Peter Smith: What Do Birds Have to Do With the Price of Gold? Smith cautions retailers against expending too much energy on things they can’t control, like the rising price of gold.
TrendsNov 04, 2025
Amanda’s Style File: Fall Colors for November BirthdaysCitrine and topaz are birthstones fit for fall as the leaves change color and the holiday season approaches.
IndependentsNov 04, 2025
Weston Jewelers Heads to Fort LauderdaleThe family-owned jeweler will open its fourth store in Florida in late 2027.
CrimeNov 03, 2025
Men Dressed as Construction Workers Burglarize Jeweler’s Home The NYPD is looking for three men who stole a safe and jewelry valued at $3.2 million from the home of a jeweler in Jamaica Hills, Queens.
MajorsNov 03, 2025
Matthew Rosenheim Takes Over as JA Board ChairThe trade organization also announced its executive committee and five new directors.
CollectionsNov 03, 2025
Muse’s ‘Have a Heart’ Collab Returns, Now With DDGThe “Have a Heart x Diamonds Do Good” collection is championed by model and humanitarian Flaviana Matata and will benefit her foundation.
AuctionsNov 03, 2025
Kashmir Sapphire Ring Tops Christie's Online AuctionThe ring, set with a nearly 17-carat Kashmir cabochon sapphire, sold for $1 million.
TrendsOct 31, 2025
Piece of the Week: A Spinner Fit for ‘Frankenstein’This “Mother Father” spinner necklace from Heavenly Vices Fine Jewelry draws inspiration from Victorian Era jewelry.
CrimeOct 31, 2025
5 More Arrested in Louvre Heist, Jewelry Still Missing The suspects were rounded up in Paris and its suburbs on Wednesday night, but none of the stolen jewels were recovered with them.
Recorded WebinarsOct 31, 2025
Watch: How to Master Google Reviews for Your BusinessExperts share top tips on how to encourage positive reviews and handle negative feedback.
Supplier BulletinOct 30, 2025
Protect Your Customers and Your BusinessSponsored by the Gemological Institute of America
