The largest known fancy vivid blue-green diamond could fetch more than $12 million at its second auction appearance.
De Beers, Diacore Buy Blues From the Cullinan Mine
The two companies paid a little over $40 million for the five diamonds, which range in size from 10 to 26 carats.

London—De Beers Group and Diacore are partnering to buy the five blue diamonds recovered from South Africa’s Cullinan Mine in the same week earlier this year.
De Beers and the diamond manufacturer are paying $40.36 million, split equally between the two companies, for the collection, which totals 85.62 carats and ranges in size from about 10 to 26 carats.
Two natural color diamond experts, Joseph Namdar of Namdar Inc. and Eden Rachminov, said they cannot comment on the purchase price until the diamonds are polished and graded.
“I can tell you with absolute certainty, however, that the buyers are counting on the diamonds being graded as fancy vivid blue,” Namdar said. “Even if they are all graded intense blue, I don’t believe they (De Beers and Diacore) will cover their investment.”
Rachminov, chairman of the board of the Fancy Color Research Foundation, which collects and analyzes wholesale and retail data on fancy color diamonds, called the purchase of the five blue diamonds a “smart move.”
“Generally speaking, any rare fancy color diamond is considered to be a safe purchase these days as the supply diminishes year after year,” he said.
“We also see that fancy color diamond producing mines are slowly closing, such as the Argyle mine, and other mines’ futures, such as Petra (Cullinan) in South Africa and Dominion (Ekati) in Canada, are not clear.”
The diamonds (which can be seen below in the slideshow, in ascending order of size) are: 9.61, 11.42, 17.57, 21.25, and 25.75 carats.
De Beers and Diacore said in the news release on the purchase of the diamonds they will select
“expert craftsmen” to study and cut the diamonds.
Petra announced it was selling the five blue diamonds via tender about a month ago, immediately after the financially troubled miner handed itself over to lenders in a debt-for-equity restructuring deal.
The diamond miner is also dealing with allegations that security employees and contractors at the Williamson mine in Tanzania beat and shot at artisanal miners who trespassed on the site, killing at least seven of them. Petra owns a 75 percent stake in the mine; the government of Tanzania owns the other 25 percent.
Leigh Day, the same U.K. law firm that sued Gemfields over human rights abuses at its ruby mine in Mozambique, has filed a claim against Petra in the High Court in London on behalf of 35 Tanzanians who
The Latest

Emmanuel Raheb says jewelers need to start marketing early and make it easy for customers to pick a gift for mom.

In honor of the milestone, the Nebraska jeweler has debuted Leslie & Co., its new in-house jewelry brand.

Gain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.

The trade organization, which held its annual elections earlier this year, also added five new board members.


NRF’s annual survey found that 45 percent of consumers plan to purchase jewelry for a loved one this Mother’s Day.

The “Vault” charm, our Piece of the Week, expands on the memories that can be stored in a locket by connecting to your phone.

Gain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.

The open-to-the-public luxury jewelry and timepiece show, in its second year, is slated for July 23-26.

The jeweler’s Mother’s Day campaign highlights the women who work there—mothers, grandmothers, women who want to be mothers, and dog moms.

Sponsored by Jewelers Mutual

The proposed agreement follows the moissanite maker’s Chapter 11 bankruptcy protection filing last month.

The Patek Philippe for Tiffany & Co. timepiece Astor brought aboard the ill-fated ship sold for double its estimate at a Freeman’s auction.

The “Dalí’s Garden” collection was inspired by a surreal dream Neeley had after cooking a recipe from Salvador Dalí’s 1973 cookbook.

Natalie Feanny has been appointed to the role.

The pair falsely claimed their jewelry was made by Navajo artists, but it was imported from Vietnam.

Julien’s Auctions is selling the musician’s fine and fashion jewelry alongside her clothing, gold records, and other memorabilia.

Rachel King’s book dives into the history of the pendant believed to have belonged to Henry VIII and his first wife, Katherine of Aragon.

The company will have deals on precious metals testers as well as the latest in lab-grown diamond detection technology and security.

Gabrielle “Coco” Chanel is a character in the “Coco Game” collection of watches and the queen in its first haute horlogerie chessboard.

The annual list honors rising professionals on the retail and supply sides of the jewelry industry.

Seized in Kentucky, the packages include fake Cartier, Tiffany & Co., Chanel, and Fendi jewelry.

Rodolfo Lopez-Portillo faces 25 years to life in prison after being found guilty in the March 2022 beating death of Arasb Shoughi.

“Jewelry Creators: Dynamic Duos and Generational Gems” highlights the relationships among 22 influential designers, brands, and gem dealers.

The AJS Spring 2027 show will be held in Savannah, Georgia, with future shows taking place in other Southeast cities.

The jewelry retailer plans to open 20 new stores this year and expand into new product categories.

Flower motifs are the jewelry trend blooming amongst the new collections that debuted this spring.






















