Sourcing

Sotheby’s Finds 2 Partners for 60-Carat Pink Diamond

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.

20160607_Pink-Star.jpg
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.

Brecken Branstratoris the senior editor, gemstones at National Jeweler, covering sourcing, pricing and other developments in the colored stone sector.

The Latest

Ani Khachian
MajorsAug 06, 2026
AJA East Coast Names Ani Khachian as First Female President-Elect

The Armenian Jewelers Association’s East Coast chapter has also elected its 2026–2027 board of directors.

JCPenney storefront
MajorsAug 05, 2026
Private Equity Firm Wants to Buy 100+ JCPenney Stores

Onyx Partners has submitted a second offer to buy the department stores after its first offer fell through last year.

The Roaring Jewel Martini
IndependentsAug 05, 2026
Atlanta Jeweler Introduces $10K Martini

Solomon Brothers Jewelers has partnered with local cocktail bar Roaring Social on a new martini garnished with a tennis necklace.

1872-x-1052-July-ad (1).png
Brought to you by
Why More Jewelry Retailers Are Hosting Turnkey Estate Buying Events

Retailers are seeking new ways to attract customers, increase traffic, and create revenue – Estate buying events are a popular solution.

Benjamin Siegel of Hamilton Jewelers
IndependentsAug 05, 2026
Another Member of the Siegel Family Joins Hamilton Jewelers

Benjamin Siegel, son of President and CEO Hank Siegel, started working for the family business this week.

Weekly QuizJul 30, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Bulgari San Diego Store Exterior
MajorsAug 05, 2026
Bulgari Opens Store in San Diego

The new space features a modern design that blends Bulgari’s Roman heritage with San Diego’s coastal spirit.

Mugshots of four men
CrimeAug 04, 2026
Crew of Thieves Break Into Indiana Jeweler’s Home

Four men were charged in connection with the break-in and accused of stealing $365,000 in cash, jewelry, and designer goods.

Brought-To-By-Article-Top-Image.jpg
Brought to you by
Wedding Band Trends 2026: Personalization Takes Center Stage

Colored gemstones, artisan finishes, mixed metals, and meaningful details are shaping demand in bridal jewelry.

André Branch
MajorsAug 04, 2026
Pandora Hires Former Signet Board Member to Lead North American Market

André Branch has more than 25 years of experience with various brands, most recently serving as CEO of Ariana Grande’s cosmetics company.

Gemlok earrings
MajorsAug 04, 2026
Sasha Primak Acquires Gemlok

New York-based atelier Gemlok is best known for creating the innovative “bridge” setting that became popular in the bridal market.

Santana Now Unidad Collection Campaign Imagery
CollectionsAug 04, 2026
Musician Carlos Santana Launches Jewelry Brand

Santana Now's debut collection, “Unidad,” features symbolic motifs as well as pieces of wood from the Woodstock stage.

Stock image of a gavel and books
CrimeAug 03, 2026
Florida Man Gets 15 Years in Trio of Jewelry Store Robberies

The 50-year-old man pleaded guilty earlier this year to robbing two jewelry stores and a pawn shop of more than $700,000 in merchandise.

Spider-Man Citizen watch and pin on a web
WatchesAug 03, 2026
Citizen's New Spider-Man Watch Is a Collector’s Dream

The watch’s dial features an original design by Marvel comics illustrator Adam Kubert.

Chatham Men’s Collection Campaign Imagery
CollectionsAug 03, 2026
Chatham Releases First Men’s Collection

The new collection of lab-grown diamond and colored gemstone jewelry provides a “fresh perspective” on the category, Chatham said.

Pomellato Marvelous Griffe earrings
TrendsAug 03, 2026
Amanda’s Style File: Spinel vs. Peridot

While some August babies are team peridot, the month's time-honored birthstone, others are team spinel, the newer alternative.

Edina Kiss Popsicle Pendant and Karina Choudhrie Ice Cream Charm
TrendsJul 31, 2026
These Pieces of the Week Are Sweet

Edina Kiss’ “Popsicle” pendant and Karina Choudhrie’s “Ice Cream” charm satisfy that summer craving for a sweet piece of jewelry.

Macy’s Herald Square store sign
MajorsJul 31, 2026
Macy’s Iconic Red Shopping Bag Sign Torn Down

The massive billboard has been in the same spot on the department store’s Herald Square flagship store for decades.

U.S. Trade Representative Jamieson Greer and Jewelers of America President and CEO David Bonaparte in Washington, D.C.
Policies & IssuesJul 30, 2026
JA Heads Back to Washington as New Wave of Tariffs Takes Effect

David Bonaparte, along with Tim Haake and Ronnie VanderLinden, continue to lobby for tariff exemptions for diamonds, gemstones, and pearls.

Hands pushing shopping cart
SurveysJul 30, 2026
Consumer Confidence Slips in July

Survey respondents were concerned about the rising prices of food and groceries as well as unemployment.

Paola De Luca Presents Trendvision Book
Events & AwardsJul 30, 2026
Vicenzaoro Releases 2026 Education Lineup

The trade show, slated for Sept. 4-8 in Vicenza, Italy, will feature sessions on trends, AI, gemology, and manufacturing.

Jewels by Grace Hillsborough Show
Events & AwardsJul 30, 2026
Hillsborough Show Moves to New Location for 2026

The public shopping event featuring art, jewelry, watches, and rare collectibles, will take place in Santa Clara, California, this fall.

Endiama Commercial Director Elton Escrivão at the 2026 African Mining Indaba
EditorsJul 29, 2026
Q&A: The Past and Future of Angola’s Diamond Industry

Endiama Commercial Director Elton Escrivão knows people have a lot of misperceptions about Angola. He wants to change that.

Kevin Reilly PGI USA
MajorsJul 29, 2026
Kevin Reilly Retires After 39 Years in the Jewelry Industry

Reilly has been with PGI USA for the last 20 years, leading partnership development and professional education.

Pomellato Mandala Chromia necklace
FinancialsJul 29, 2026
Kering’s H1 Jewelry Sales Up 14%

Boucheron reached record sales while Pomellato found success in its signature collections.

United Flags of Fashion Arkansas Flag By Lauren Harwell Godfrey
Events & AwardsJul 29, 2026
Lauren Harwell Godfrey Designs a Flag for Arkansas

She was one of more than 120 American designers who created flags for the “United Flags of Fashion” project led by CFDA and Vogue.

The Retail Smiths partner and National Jeweler columnist Peter Smith 
ColumnistsJul 28, 2026
Peter Smith: Why Your Job Postings May Be Working Against You

Smith reveals the method The Retail Smiths use to help retailers and vendors write better job postings.

Tiffany & Co butterfly necklace
FinancialsJul 28, 2026
Tiffany & Co., Bulgari Lead the Way for LVMH in H1

LVMH’s jewelry and watch brands outperformed the company’s other divisions in an environment the company described as “disrupted.”

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy