Chris Blakeslee has experience at Athleta and Alo Yoga. Kendra Scott will remain on board as executive chair and chief visionary officer.
Why the Biggest Rough Diamond in a Century Failed to Sell
The CEO of the company that found the 1,109-carat Lesedi la Rona said, “the historical significance of the stone seems to have been missed based on the bids offered.”

London--Even after a lot of publicity and excitement around Lucara’s 1,109-carat Lesedi la Rona rough diamond, the tennis-ball sized stone failed to sell at auction Wednesday.
Discovered at Lucara Diamond Corp.’s Karowe Mine, the stone is the largest rough diamond found since the 3,016.75-carat Cullinan Diamond in 1905.
Lucara said that bidding at the auction at Sotheby’s London did not meet the reserve price--Sotheby’s pre-sale estimate on the stone was $70 million--so it will “retain” the stone for now. The highest bid reached was $61 million, $68.3 million with buyer’s premium.
Lucara CEO and President William Lamb told National Jeweler, “It needs to be understood that this is the first time anyone has attempted to sell a rough diamond via the auction process. Lucara wanted to understand whether there was a market for truly exceptional diamonds where they would be purchased as collectables the same as high-value art.
“We understand that it is not easy to see the true value in a diamond when the only mechanism is to value the polished. The historical significance of the stone seems to have been missed based on the bids offered.”
When asked what role he thought Brexit or other global economic situations might have had on the outcome, he said, “We cannot say. In today’s volatile times, there is always some level of economic uncertainty. Saying this is the reason the auction did not conclude with the sale of the stone would be incorrect, although it may have in some way played a small part.”
When the news first broke that the stone would be put up for auction, Sotheby’s said it commissioned independent reports on the potential yield of Lesedi la Rona from the Gem Certification and Assurance Lab (GCAL) and Diamex Inc./Crodiam Consulting DMCC.
The reports weren’t made public, though a few details were released, including the fact that experts believe that the Lesedi la Rona could yield a polished white diamond that tops the “Great Star of Africa” (530.20 carats) in size.
The reports also stated that there is a “high probability” that the polished diamonds cut from the 1,109-carat rough will be D color.
Aside from its size, the fact that
With the auction having failed, Lamb said there are a number of options available to Lucara, ranging from partnering on the stone to holding a regular tender within the diamond market or putting the stone on display at a museum.
He said with no pressing need to sell the stone, Lucara has time to decide what might be the best route to take.
Aside from Lesedi la Rona, Wednesday’s auction also featured three other pieces of rough, proceeds from the sale of which will go to the Lady Khama Charitable Trust. The trust supports existing charitable organizations working on community development and projects that benefit vulnerable women and children.
All three lots' pre-sale estimates were between $10,000 and $15,000 but came in well above that.
A rough diamond weighing 5.44 carats and octahedron in form garnered $57,500. A 5.62-carat rough diamond of octahedron form went for $42,500, and a third piece of rough weighing 5.78 carats of rhombic dodecahedron form sold for $40,000.
The Latest

The credit card companies’ surveys examined where consumers shopped, what they bought, and what they valued this holiday season.

Kimberly Miller has been promoted to the role.

How Jewelers of America’s 20 Under 40 are leading to ensure a brighter future for the jewelry industry.

The “Serenity” charm set with 13 opals is a modern amulet offering protection, guidance, and intention, the brand said.


“Bridgerton” actresses Hannah Dodd and Claudia Jessie star in the brand’s “Rules to Love By” campaign.

Founded by jeweler and sculptor Ana Khouri, the brand is “expanding the boundaries of what high jewelry can be.”

Roseco’s 704-page catalog showcases new lab-grown diamonds, findings, tools & more—available in print or interactive digital editions.

The jewelry manufacturer and supplier is going with a fiery shade it says symbolizes power and transformation.

The singer-songwriter will make her debut as the French luxury brand’s new ambassador in a campaign for its “Coco Crush” jewelry line.

The nonprofit’s new president and CEO, Annie Doresca, also began her role this month.

As the shopping mall model evolves and online retail grows, Smith shares his predictions for the future of physical stores.

The trade show is slated for Jan. 31-Feb. 2 at The Lighthouse in New York City's Chelsea neighborhood.

January’s birthstone comes in a rainbow of colors, from the traditional red to orange, purple, and green.

Footage of a fight breaking out in the NYC Diamond District was viewed millions of times on Instagram and Facebook.

The supplier has a curated list of must-have tools for jewelers doing in-house custom work this year.

The Signet Jewelers-owned store, which turned 100 last year, calls its new concept stores “The Edit.”

Linda Coutu is rejoining the precious metals provider as its director of sales.

Sparkle with festive diamond jewelry as we celebrate the beginning of 2026.

The master jeweler, Olympian, former senator, and Korean War veteran founded the brand Nighthorse Jewelry.

In its annual report, Pinterest noted an increase in searches for brooches, heirloom jewelry, and ‘80s luxury.

Executive Chairman Richard Baker will take over the role as rumors swirl that a bankruptcy filing is imminent for the troubled retailer.

Mohr had just retired in June after more than two decades as Couture’s retailer liaison.

Shekhar Shah of Real Gems Inc. will serve as president of the Indian Diamond & Colorstone Association in 2026.

This year’s good luck charm features the mythical horse Pegasus, and is our first Piece of the Week of the new year.

Articles about crime, engagement rings, and a necklace worn in the World Series generated the most interest among readers.

As part of the leadership transition, Sherry Smith will take on the role of vice president of coaching strategy and development.






















