Events & AwardsOct 29, 2025
October Brings Little Change to Consumer Confidence Consumers are feeling more optimistic about their present situation while the short-term future remains a little scary.
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
Events & AwardsOct 29, 2025
Couture Partners With Time to WatchesThe company, which organizes a watch show in Geneva every spring, will bring a selection of watch brands to the 2026 Couture show in Vegas.
TrendsOct 29, 2025
Beth Bernstein Releases Vintage Jewelry Guide“The Modern Guide to Vintage Jewellery” follows the evolution of jewelry design from the ‘30s to the ‘80s with buying and styling advice.
EditorsOct 29, 2025
Why Creepy, Crawly Bugs Inspire Beautiful JewelryFor her annual Halloween story, Senior Editor Lenore Fedow explores the symbolism behind spiders, beetles, and other eerie insects.
Weekly QuizOct 16, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
Events & AwardsOct 28, 2025
Meet the 2026 Gem Award NomineesNotable jewelry designers, members of the press, and retailers are up for an award at next year’s gala.
Recorded WebinarsOct 28, 2025
Watch: The State of the Jewelry Industry Leaders from Jewelers of America and National Jeweler discuss the gold price, tariffs, and more in this one-hour webinar.
Brought to you by
DESERT DIAMONDS: The Newest Trend in Natural Diamond JewelryFrom sunlit whites to smoky whiskeys, introduce your clients to extraordinary diamonds in colors as unique as their love.
CollectionsOct 28, 2025
Eriness Reflects on Life in ‘One of One’ CollectionAfter experiencing motherhood, growth, and loss, founder and designer Erin Sachse has created 10 irreplaceable jewels.
AuctionsOct 27, 2025
Napoleon Left This Brooch Behind, And Now It’s Up For AuctionIt is part of Sotheby’s “Royal & Noble Jewels” sale along with an ornate hair ornament and an old mine-cut light pink diamond ring.
CrimeOct 27, 2025
Arrests Made in Louvre Jewel Heist One of the individuals was apprehended at the airport as he was trying to flee the country.
MajorsOct 27, 2025
Target to Cut 1,800 Corporate JobsThe retailer, which has faced struggling sales in recent quarters, is looking to streamline its operations.
Events & AwardsOct 27, 2025
Hill Management Group Hired to Help Atlanta Jewelry ShowHill Management Group will oversee, market, and produce next year’s spring show.
AuctionsOct 24, 2025
Bonhams Under New Ownership, Top Executives ReplacedLondon-based investment firm Pemberton Asset Management acquired the auction house for an undisclosed amount.
GradingOct 24, 2025
DMIA to Hold Diamond Testing Instrument DemoThe workshop will give attendees the chance to try out and ask questions about three different diamond verification instruments.
CrimeOct 24, 2025
Video Emerges of Louvre Jewelry Robbers Fleeing the Scene The footage shows two of the jewelry heist suspects descending from the second floor of the museum and then escaping via scooter.
CollectionsOct 24, 2025
Piece of the Week: Wyld Box Jewelry’s ‘Ray of Light’ EarringsFounder and designer Rosanna Fiedler looked to a vintage Cartier clutch when designing the sunlight-inspired drop earrings.
FinancialsOct 23, 2025
Jewelry Sales Resilient Despite Struggles at LVMH, KeringThe luxury conglomerates faced a challenging Q3 amid geopolitical and economic tensions.
WatchesOct 23, 2025
‘Million Dollar Hip Hop Watches’ Recounts Watch HistoryThe book details the journey of watches as symbols of hard-earned success in hip-hop for artists like 2Pac, Jay-Z, and more.
AuctionsOct 23, 2025
Freeman’s | Hindman Names New VP, Senior Specialist for Jewelry & WatchesAlexis Vourvoulis, who most recently worked at Tiffany & Co., brings more than two decades of jewelry experience to her new role.
TrendsOct 22, 2025
The Taylor Swift Effect: Antique Diamonds EditionThe superstar’s August engagement put the stamp of approval on an already hot engagement ring trend.
TrendsOct 22, 2025
Don’t Forget These Diamond Jewelry Trends When Stocking for the HolidaysRetailers should offer classic styles with a twist that are a perfect fit for layered looks, experts say.
AuctionsOct 22, 2025
Pink Diamond, Vanderbilt Jewels to Headline Phillips’ Geneva AuctionThe nearly 7-carat fancy vivid purplish pink diamond could sell for around $9 million.
CollectionsOct 22, 2025
Tiffany & Co.’s ‘Bird on a Rock’ Finds New PerchChief Artistic Officer Nathalie Verdeille has reimagined the iconic design in both figurative and abstract creations.
Events & AwardsOct 22, 2025
JFC Kicks Off Halloween Costume ChallengeFive dollars buys one vote toward an industry professional you want to see dressed up as a hero, or a villain, this Halloween.
Events & AwardsOct 22, 2025
Hillsborough Antique Show Gets New OwnerRecently acquired by KIL Promotions, the November edition of the public show in San Mateo, California, will be held Nov. 7-9.
GradingOct 21, 2025
GIA Examines Rare Bicolor Pink DiamondThe stone’s two zones, one pink and one colorless, may have formed at two different times, the lab said.
