Auctions

555-Carat ‘Enigma’ Black Diamond Sells for $4.3M Via Cryptocurrency

AuctionsFeb 10, 2022

555-Carat ‘Enigma’ Black Diamond Sells for $4.3M Via Cryptocurrency

The founder of a cryptocurrency company purchased the stone and will rename it the “Hex.com” diamond.

20220210_Enigma-header.jpg
The founder of a cryptocurrency company called Hex bought this 555-carat black diamond for $4.3 million at auction using cryptocurrency, of course.
Dubai—The 555-carat black diamond initially dubbed “The Enigma” just sold for $4.3 million at auction.

Richard Heart, founder of cryptocurrency company Hex, tweeted Wednesday that he’s the one who purchased the diamond. He said he will rename the stone the “Hex.com” diamond.

Unsurprisingly, he used cryptocurrency to buy it, the auction house confirmed in a tweet of its own

Sotheby’s offered the diamond in a one-lot sale that ran from Feb. 3-9, selling it without reserve, meaning there was no minimum bid required. 

The final hammer price fell at the low end of the auction house’s pre-sale estimated range of £3 million-£5 million ($4.1 million-$6.8 million).

 
The largest faceted diamond of any kind to appear at auction, reports from both the Gemological Institute of America and Gübelin identify the stone as a free-form faceted natural fancy black diamond.

The hamsa, the palm-shaped symbol that is a sign of protection, inspired its shape. The hamsa is associated with the number five, aligning with the diamond’s 555.55 carats as well as its 55 facets.

In 2004, GIA issued a grading report for The Enigma, stating it was “the largest fancy black, natural color and largest diamond” it had graded to date.

The 2006 Guinness Book of World Records also listed it as the largest cut diamond in the world.

Prior to the Sotheby’s sale, the diamond had neither been seen on the market nor exhibited to the public.

The sale of the black diamond via cryptocurrency follows that of the “10138 The Key” flawless diamond in Hong Kong last year.

The buyer paid $12.3 million for the stone using the digital payment system.

 Related stories will be right here …

The Latest

London Jewelers Rolex East Hampton Boutique Exterior
WatchesAug 25, 2025
London Jewelers Brings Rolex to Historic Hamptons Home

The new stand-alone Rolex boutique is housed in the former Odd Fellows Hall, a landmark built in 1897.

Madison Keys
CollectionsAug 25, 2025
Tennis Star Madison Keys Has the Perfect Necklace for the US Open

The Brilliant Earth ambassador co-designed a diamond medallion featuring meaningful symbols.

WatchTime New York
WatchesAug 25, 2025
WatchTime NY Show Returns for 10th Anniversary Edition

The three-day watch collector show, coming this October, will feature 44 exhibiting brands, as well as a new dinner experience.

japac-btyb.png
Brought to you by
Rallying Call for the Jewelry Industry on Tariffs and Other Key Issues

Jewelers of America is leading the charge to protect the industry amidst rising economic threats.

Marie Lichtenberg emerald and diamond locket on the 18-karat gold “Rosa” chain
TrendsAug 25, 2025
Amanda’s Style File: That’s a Wrap

Wrap jewelry is more than just a trend; it’s the perfect motif for the coming season of layering, scarves, and pumpkin spice.

Weekly QuizAug 22, 2025
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Sriram “Ram” Natarajan
GradingAug 22, 2025
Former Head of GIA India Promoted to Oversee Global Operations

Sriram “Ram” Natarajan is now GIA’s senior vice president of laboratory operations and is based out of the lab’s headquarters in Carlsbad.

Retrouvaí Diamond Vein Bond Collar
CollectionsAug 22, 2025
Piece of the Week: Retrouvaí’s ‘Diamond Vein Bond’ Collar

The one-of-a-kind collar represents the beauty of imperfection and the strength to rebuild.

rio-article photo-diamond.jpg
Brought to you by
Taking the Moment Head On: How Rio Grande Champions the Present & Future of Fine Jewelry

As a leading global jewelry supplier, Rio Grande is rapidly expanding and developing new solutions to meet the needs of jewelers worldwide.

Kendra Scott
MajorsAug 22, 2025
Kendra Scott Returns as CEO of Her Jewelry Empire

Three C-suite executives, including former CEO Tom Nolan, have resigned as part of what the company describes as a “transition.”

Claire’s storefront
MajorsAug 21, 2025
Claire’s Finds Buyer, Could Save up to 950 Stores

The retailer, which recently filed Chapter 11, inked a deal to sell its North American business and intellectual property.

Target CEO Brian Cornell and COO Michael Fiddelke
MajorsAug 21, 2025
Target Names New CEO as Sales Continue to Lag

Target CEO Brian Cornell will step down in February and be replaced by the company’s chief operating officer, Michael Fiddelke.

Jewelers of America in Washington DC
Policies & IssuesAug 21, 2025
JA, IDMA Talk Tariffs With Execs in DC

The group met with the president's senior trade advisor earlier this week to express the industry’s concerns about the effects of tariffs.

Tiffany & Co. Pop Up at U.S. Open
MajorsAug 21, 2025
Tiffany & Co. Pops Up at 2025 US Open

The pop-up will display this year's Tiffany & Co. Singles Championship trophies along with a diamond-encrusted tennis racket and ball.

Bellman’s Jewelers The Truthful Jeweler Alex Bellman
IndependentsAug 20, 2025
Bellman’s Jewelers Opens Second Store After COO's TikTok Takes Off

The New Hampshire-based store has expanded to Boston, propelled by the success of Alex Bellman’s TikTok page, “The Truthful Jeweler.”

Stock image of police cars with lights flashing
CrimeAug 20, 2025
Another CA Jewelry Store Rammed With Car, Robbed

The latest incident happened Monday at a store in Oakland, California, continuing a pattern JSA first warned about last month.

Oris New York Harbor Limited Edition II Watch
WatchesAug 20, 2025
Oris Launches Watch Benefiting NYC Harbor Oyster Restoration

The new aqua green New York Harbor Limited Edition II is the watchmaker’s second collaboration with the Billion Oyster Project.

Jewelers for Children logo
Events & AwardsAug 20, 2025
Take the Jewelers for Children ‘Trinity of Purpose’ Challenge

Participants who attend any three Rings of Strength events will be awarded a special medal.

Lulo Rose pink diamond
SourcingAug 19, 2025
Dubai’s Jemora Group Buys Diamond Miner Lucapa

The investment company, founded by Dev Shetty, has acquired the struggling miner and its assets, including the Lulo mine in Angola.

National Jeweler columnist and jewelry sales expert Peter Smith
ColumnistsAug 19, 2025
Peter Smith: The Arrival Fallacy and Jewelry Retail

Smith shares wisdom he gleaned from a podcast he was listening to one morning while being walked by his dog, a Malshi named Sophie.

Fake Van Cleef & Arpels Alhambra earrings
CrimeAug 19, 2025
Customs Seizes 7,300 Pairs of Fake ‘Alhambra’ Earrings

The counterfeit Van Cleef & Arpels jewels would have been worth more than $30 million if genuine.

MJSA Logo
MajorsAug 19, 2025
MJSA Apprenticeship Program Is Nationally Recognized

The MJSA Mentor & Apprenticeship Program received the Registered Apprenticeship Program designation by the U.S. Department of Labor.

Masaki Obu
WatchesAug 19, 2025
Casio America Names New Timepiece Division Manager

Casio executive and watch enthusiast Masaki Obu is the new general manager of its U.S. timepiece division.

Michael Barabash and husband Raymond Cuadrado
MajorsAug 18, 2025
Verragio’s Michael Barabash, a ‘Kind Soul,’ Dies at 58

Barabash, Verragio’s client relations representative, was a vital member of the team and is remembered as being warm and full of life.

John Hardy Dot Coil Necklace and Dot Hoop Earrings
CollectionsAug 18, 2025
John Hardy’s New ‘Dot’ Collection Is on Point

Originally introduced in 1992, the “Dot” collection is back with a capsule featuring five archival designs and three new creations.

IJO Vendor of the Year Allison-Kaufman
Events & AwardsAug 18, 2025
IJO Announces 2025 Vendor of the Year

Allison-Kaufman has received the honor for the fourth year in a row.

Image of Winona Ryder and Iman from Pandora’s Be Love marketing campaign
FinancialsAug 15, 2025
In Q2 Results, Pandora Talks Tariffs, Q4 Plans

The company had a solid second quarter, with sales of non-charm jewelry outpacing sales of pieces in its core collections.

Taylor Swift Etho Maria ruby earrings The Life of a Showgirl TS12
EditorsAug 15, 2025
Piece of the Week: Etho Maria’s Showgirl-Approved Ruby Drop Earrings

Taylor Swift dons the vibrant pair in new promotional imagery for her upcoming album, “The Life of a Showgirl,” set to release in October.

×

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