Auctions

‘Infinite Blue’ Diamond Could Fetch Up to $37M at Auction

AuctionsAug 28, 2023

‘Infinite Blue’ Diamond Could Fetch Up to $37M at Auction

Sotheby’s Hong Kong will offer the 11.28-carat fancy vivid blue diamond at a single-lot sale in October.

“Infinite Blue” 11.28-carat fancy vivid blue diamond
The 11.28-carat mixed-cut “Infinite Blue” diamond will be offered at Sotheby’s Hong Kong this fall.
Hong Kong—Pink and red stones have dominated auction headlines in 2023 but a blue diamond is soon set to have its moment. 

Sotheby’s Hong Kong will offer the 11.28-carat “Infinite Blue” diamond in a single-lot sale on Oct. 5. It is expected to sell for between $26 million and $37 million.   
 
The stone was purposely cut to include the number 8 in the carat weight, which is considered an auspicious number in Asia. The number, which turned on its side is the infinity symbol, is responsible for the diamond’s name too.  
 
The GIA graded the Infinite Blue stone fancy vivid blue. The highest possible color grade for blue diamonds, only about 1 percent of blue diamonds submitted to the lab are deemed to be fancy vivid.  
 
The Infinite Blue is a Type IIb diamond, meaning it has little to no nitrogen like Type IIa diamonds but contains boron, which is responsible for its color.  
 
Per the GIA’s monograph on the stone, the diamond’s cut-cornered rectangular mixed-cut represents a modern cutting style with the classic proportions and crown faceting of an emerald cut but with the triangular and kite-shaped facets signature to brilliant cuts on the pavilion. 

“Infinite Blue” 11.28-carat fancy vivid blue diamond
The “Infinite Blue” diamond is set in a ring with a pink diamond halo and white diamond side stones.
 
 “To say the Infinite Blue is special cannot be overstated,” the GIA monograph reads.  
 
“This glorious and notable diamond is an example of what can occur when nature leads the way and humankind embraces the Earth’s treasures—producing a radiant gem of spirited light performance. The Infinite Blue will continue to stun gem connoisseurs and diamond lovers alike. In the world of gems, blue diamonds steal the show.” 
 
Hailing from Petra Diamonds’ Cullinan mine in South Africa, the Infinite Blue joins a small group of blue diamonds weighing more than 10 carats from the mine that have appeared at auction. 
 
“The Blue Moon of Josephine,” a 12.03-carat cushion-cut internally flawless fancy vivid blue diamond sold for $48.5 million, or approximately $4 million per carat, in 2015.  
 
“The De Beers Blue,” a 15.10-carat step-cut fancy vivid blue diamond sold for $57.4 million, or approximately $3.8 million per carat, in 2022 and “The Oppenheimer Blue,” a 14.62-carat rectangular-cut diamond, sold for $57.5 million or about $3.9 million per carat in 2016.  

 Related stories will be right here … 

The Latest

Lugano Diamonds store in Greenwich, Connecticut
IndependentsMay 09, 2025
Lugano Diamonds CEO Resigns Amid Internal Investigation

Moti Ferder stepped down Wednesday and will not receive any severance pay, parent company Compass Diversified said.

Coeur Percé Scapular Necklace and Love Baby Locket
CollectionsMay 09, 2025
Pieces of the Week: Marie Lichtenberg’s Collaborations for Mother’s Day

Lichtenberg partnered with luxury platform Mytheresa on two designs honoring the connection between mothers and daughters.

Gemfields emeralds
SourcingMay 09, 2025
Gemfields Resumes Emerald Mining in Zambia

The miner announced plans to recommence open-pit mining at Kagem.

antique_Vegas_2024_by_headshot_stories_9454.jpg
Brought to you by
Las Vegas Antique Jewelry & Watch Show: Showcasing the Most Collectible Merchandise from Across the Globe

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

Stock image of a man’s hands in handcuffs
CrimeMay 08, 2025
Former NYC Jewelry Store Employee Arrested in 2017 Choking Death of Boss

Michel Desalles allegedly murdered Omid Gholian inside World of Gold N Diamond using zip ties and then fled the country.

Weekly QuizMay 08, 2025
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
2025 Met Gala jewelry
EditorsMay 08, 2025
5 ‘Superfine’ Met Gala Jewelry Moments

Associate Editor Lauren McLemore shares her favorite looks from a night of style inspired by Black dandyism.

instappraise-1.png
Supplier BulletinMay 08, 2025
Instappraise Introduces Game-Changing Trifold Appraisal Format

Sponsored by Instappraise

Supplier Spotlight -Recorded-Webinar.png
Brought to you by
Watch: The Winston Red: GIA Examines the Smithsonian’s Newest Addition

Supplier Spotlight Sponsored by GIA

Brilliant Earth three stone Sabine diamond engagement ring
FinancialsMay 08, 2025
Brilliant Earth Notes an Uptick in Engagement Ring Sales in Q1

CEO Beth Gerstein discussed the company’s bridal bestsellers, the potential impact of tariffs, and the rising price of gold.

Exterior of Margot McKinney Beverly Hills Location
IndependentsMay 08, 2025
Margot McKinney Lands in the U.S. With New Boutique

The brand’s first independent location outside of Australia has opened in Beverly Hills, California.

Cathy Marsh
IndependentsMay 08, 2025
Verragio Announces New Regional Sales Manager

Cathy Marsh will lead the jewelry company’s efforts in the upper Midwest and western United States.

Pandora gold and silver charm bracelet
FinancialsMay 07, 2025
Pandora Posts Strong Q1, Plans for Tariffs

The company has multiple strategies for dealing with tariffs, though its CEO said moving manufacturing to the U.S. is not one of them.

Headshot of Smart Age Solutions CEO Emmanuel Raheb
ColumnistsMay 07, 2025
The Smart Lab: Building a Seasonal Marketing Strategy for Mother’s Day and Beyond

Connecting with your customers throughout the year is key to a successful holiday marketing push.

Gemfields rough emeralds
SourcingMay 07, 2025
Gemfields Says Emerald Sales Improved in Latest Auction

Its commercial-quality emerald sale held last month totaled more than $16 million, up from about $11 million in September 2024.

Logo for “In the Loupe,” Punchmark’s podcast
TechnologyMay 07, 2025
Punchmark’s Latest Podcast Features a Very Special Guest

National Jeweler Editor-in-Chief Michelle Graff joined Michael Burpoe to talk tariffs, consumer confidence, and the sky-high price of gold.

Jewelers of America 20 Under 40 for 2025
Events & AwardsMay 06, 2025
Here’s Who Made Jewelers of America’s New ‘20 Under 40’ List

Expanded this year to include suppliers, JA’s 2025 list honors 40 up-and-coming professionals in the jewelry industry.

Sissys Log Cabin Fort Smith Arkansas
IndependentsMay 06, 2025
Sissy's Log Cabin Opens New Store

Located in Fort Smith, it’s the Mid-South jeweler’s first store in Northwest Arkansas.

Gunderson’s Jewelers
IndependentsMay 06, 2025
Gunderson’s Jewelers to Be Featured on ‘World’s Greatest’ TV Series

The episode about the family-owned jeweler will premiere May 17.

Zadok Jewelers Austin store
IndependentsMay 05, 2025
Zadok Jewelers Opens Store in Austin

The Houston-based jeweler’s new 11,000-square-foot showroom will include a Rolex boutique.

David DeCook Crater of Diamonds State Park 3.81-carat brown Duke Diamond
SourcingMay 05, 2025
Crater of Diamonds Yields 4-Carat Brown Diamond

“The Duke Diamond” is the largest diamond registered at the Arkansas park so far this year.

Kraft Mac & Cheese x Ring Concierge Forever Macaroni Necklace
TrendsMay 02, 2025
Ring Concierge, Kraft Partner on Mother’s Day Macaroni Necklace

The childhood craft of making dried pasta necklaces for Mother’s Day is all grown up as the 14-karat gold “Forever Macaroni” necklace.

Angely Martinez emerald Promise ring
CollectionsMay 02, 2025
Piece of the Week: Angely Martinez’s Emerald Promise Ring

Set with May’s birthstone and featuring an earthworm, this ring is a perfect celebration of spring.

Stuller 2025-2026 bridal catalog
MajorsMay 02, 2025
Stuller’s New Bridal Catalog Is Here

“Bridal 2025–2026” includes popular styles and a dedicated section for quick pricing references of lab-grown diamond bridal jewelry.

Americut Gems
SourcingMay 01, 2025
Tariffs & Colored Gemstones: Relying on Stock, Considering the Ripple Effect

Though currently paused, high tariffs threaten many countries where gemstones are mined. Dealers are taking measures now to prepare.

Exterior of new David Yurman store in the Miami Design District
MajorsMay 01, 2025
Peek Inside David Yurman’s New Miami Flagship Store

Located in Miami’s Design District, the 4,000-square-foot store is an homage to David and Sybil Yurman’s artistic roots.

Oscar Heyman emerald and diamond necklace
TrendsMay 01, 2025
Amanda’s Style File: 20 Pieces of Emerald Jewelry for May

May babies are lucky indeed, born in a month awash with fresh colors and celebrated with one of the most coveted colored gemstones.

Jewelers of America logo
MajorsMay 01, 2025
Jewelers of America Opens Applications for 2025 Scholarships

The deadline to apply for the Seymour & Evelyn Holtzman Bench Scholarship is June 12.

×

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