These 8 Blue Diamonds Worth $70M+ Will Go Up for Auction
“The De Beers Exceptional Blue Collection” will be sold across Sotheby’s jewelry auctions this year and through spring 2023.

Sotheby’s has announced it will sell a group of eight fancy blue diamonds valued at more than $70 million total across its Magnificent Jewels auctions this year and into the spring.
“The De Beers Exceptional Blue Collection,” sourced and assembled by the diamond company, is appearing at auction for the first time.
The group is comprised of eight blue diamonds of various shapes and weights, ranging in size from a 1.22-carat oval brilliant-cut to an 11.29-carat step-cut diamond, for a total weight of 32.09 carats among them.
Three of the diamonds will be offered this year: the 5.53-carat stone will be a highlight of Sotheby’s Magnificent and Noble Jewels auction in Geneva on Nov. 9, while the 3.24-carat diamond and the 2.08-carat diamond will be offered in New York on Dec. 7.
The full list of the eight diamonds and their estimates are as follows.
--11.29-carat step-cut fancy vivid blue (estimated at $28 million-$50 million)
--5.53-carat cushion brilliant-cut fancy vivid blue (estimated at $11 million-15 million)
--4.13-carat step-cut fancy intense blue (estimated at $2.5 million-$3.5 million)
--3.24-carat cushion brilliant-cut internally flawless fancy vivid blue (estimated at $5 million-$8 million)
--3.10-carat cushion brilliant-cut fancy vivid blue (estimated at $4.5 million-$5 million)
--2.08-carat cushion-cut fancy intense blue (estimated at $1.2 million-$1.5 million)
--1.50-carat round brilliant-cut fancy intense blue (estimated at $750,000-$1 million)
--1.22-carat oval brilliant-cut fancy intense blue (estimated at $600,000-$800,000)
De Beers and Diacore jointly paid $40.36 million for five rough blue diamonds from the Cullinan mine weighing 85.62 carats total in November 2020.
Over almost two years, Diacore cut and polished the five rough stones to create the eight blue diamonds in the collection Sotheby’s is now presenting.
They will be on display in Hong Kong from Oct. 17-19, followed by Singapore from Oct. 20-21, Taipei from Oct.26-27, and Geneva from Nov. 4-8.
“I have remained in awe of ‘The De Beers Exceptional Blue Collection’ since the first moment I set eyes on it,” said Olivier Wagner, head of Sotheby’s Magnificent Jewels Auctions in Geneva.
“The market for colored diamonds and precious gemstones has never been stronger, so we are absolutely thrilled to be offering the first diamond of this superb collection as one of the star highlights of our Magnificent Jewels and Noble Jewels auction next month in Geneva. This important gem will, I am sure, captivate all collectors of exceptional gemstones.”
News of the diamond collection comes less than a week after the record-breaking sale of the “Williamson Pink Star” at Sotheby’s.
The 11.15-carat fancy vivid pink diamond sold for more than $57 million in Hong Kong last Friday. With a per-carat sale price of roughly $5.2 million, it now holds the price-per-carat record for any diamond or gemstone sold at auction.
Sotheby’s also sold the De Beers Blue in April, a 15.10 carat step-cut fancy vivid blue diamond that went for $57.5 million.
The Latest

This Buddha Mama butterfly is our Piece of the Week honoring the legend, who embraced the beautiful insect as her symbol.

The former De Beers CEO, and perhaps its next owner, will be a featured speaker at the event, slated for Sept. 4-7 in Italy.

The employee-owned jeweler was named a “Best Place to Work” in Maine, New Hampshire, and for women.

Submit your pieces for a chance to win in this year's competition.

The second iteration of the jewelry collection was inspired by the zodiac and the four elements: earth, water, air and fire.


General License 104B supersedes General License 104A, which was set to expire on Sept. 1.

The package, intercepted in Indianapolis, contained fake Cartier, Tiffany & Co., and Van Cleef and Arpels jewelry.

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

The new location in Costa Mesa, California, marks the brand’s second store in the United States and fourth standalone location worldwide.

The fashion watch category was once threatened by the Apple Watch, but consumers are now opting for new wearables, said Movado’s CEO.

The report delves into trending styles, the most popular jewelry brands by city, and why Belle Époque jewelry could be the next big thing.

The association added the requirement to its revised "Code of Ethics" and released the 17th edition of its “Gemstone Information Manual.”

Respondents were concerned about the future of the labor market and their income as well as the rising prices of gas and groceries.

The campaign highlights the asymmetrical high jewelry necklace style that the jeweler first created in 1879.

It will explore the life of “The King of Diamonds” and showcase more than 165 creations from the brand.

Two suspects have been arrested in connection with the complex phone scam.

In her first column for National Jeweler, Jennifer Shaheen asks jewelers if they know how to connect with the next generation of consumers.

The annual awards cover tuition for an on-site educational course at the Swiss lab, as well as flights and lodging.

The jeweler partnered with the Tennessee resort to honor its 50th anniversary with limited-edition blackberry pendants and earrings.

The third-generation jeweler shared how the North Carolina retailer is celebrating this milestone and the love story that started it all.

The class, led by renowned metalsmith Cynthia Eid, highlighted Argentium silver as an alternative to gold amid high prices.

The show is slated for Oct. 16-19 at the Miami Beach Convention Center.

The “Empresses” capsule uses 19th-century medals depicting Napoleon, Joséphine, and Marie-Louise across five one-of-a-kind pieces.

The retailers at the top of the list offer affordable products and fun, discovery-fueled experiences.

Daniel Bing was formerly the marketing director for the Americas at Vacheron Constantin.

In our Piece of the Week, the designers reimagine the tennis bracelet with green enamel wrapped around a strand of “Desert Diamonds.”

The industry veterans join the podcast to discuss diamond marketing, the FTC Jewelry Guides, and lobbying for lower tariffs.
























