2 Huge Yellow Diamonds Are Heading to Auction
Christie's is selling one of the diamonds, moving forward with its Geneva jewelry auction despite the cyberattack that took down its website.

The highlight of Christie’s “Magnificent Jewels” auction in Geneva will be “The Yellow Rose,” a 202.18-carat fancy intense yellow pear modified brilliant-cut diamond mined in South Africa.
The pre-sale estimate is about CHF 4 million ($4.41 million).
There have been only two other yellow diamonds weighing more than 200 carats sold at auction, said Christie’s.
The “Magnificent Jewels” auction is slated to take place at the Four Seasons Hotel des Bergues on Wednesday, a sale that is continuing despite the fact that the auction house’s website has been offline since Thursday evening following a cyberattack.
In an Instagram post Tuesday morning, Christie’s said it is “pleased to reassure our clients that secure bidding for Magnificent Jewels will be available in person, by telephone, absentee, or through Christie’s Live.”
Christie’s Live is its livestream of the auction. The statement on Instagram said that clients who want to bid online should contact a member of the team or the bids department to register.
The accompanying “The Jewels Online: The Geneva Edit” sale was scheduled to be open for bidding online from May 8-22. Christie’s did not respond to a request for comment about the status of the sale.
Meanwhile, Sotheby’s has a sizable yellow diamond of its own heading to its “Magnificent Jewels and Noble Jewels” sale, which will be held today in Geneva.
“The Allnatt” is a 101.29-carat fancy vivid yellow diamond, mounted in a Cartier brooch.
It has a pre-sale estimate of CHF 5.6 million to 6.5 million ($6.2 million to $7.2 million).
The stone was named after its first known owner, Major Alfred Ernest Allnatt, a British sportsman, racehorse owner, philanthropist, collector, and patron of the arts.
Allnatt acquired the diamond in the early 1950s, said the auction house, and had it mounted by Cartier.
The brooch’s floral design is similar to the mounting Cartier created for the “Williamson Pink” diamond around the same years of production (1952-1953), said Sotheby’s.
The Allnatt is “one of the largest and most historically significant yellow diamonds ever discovered,” said Sotheby’s.
The diamond is from South Africa and likely was mined more than 100 years ago, it said, adding this sale marks its first appearance on the market in nearly 30 years.
The stone has been included in several exhibitions, including “The Splendor of Diamonds” in 2003 at the Smithsonian Museum of Natural History, which highlighted seven diamonds representing the best of their colors.
As for other notable auction highlights, Christie’s sales will feature diamonds, gemstones, and signed jewels from several designers, including Buccellati, Cartier, Georges Fouquet, Tiffany & Co., Jean Schlumberger, Marina B, Van Cleef & Arpels, Sterlé, and JAR.
Up for auction is an early 20th century brooch, circa 1915, belonging to Queen Victoria Eugenia, set with sugarloaf and oval-shaped cabochon emeralds and old mine-, rose-, and calibré-cut diamonds.
It has a pre-sale estimate of CHF 150,000 to 200,000 ($165,525 to $220,700).
At Sotheby’s, another top lot is a pair of earrings set with Burmese sapphires, weighing 14.66 carats and 13.94 carats, framed by marquise-shaped diamonds “of a blue tint.”
The pre-sale estimate is CHF 1 million to 1.46 million ($1.1 million to $1.6 million).
The Latest

Most customers who walk into your store this month have made up their minds. Your job is to validate their choice, Emmanuel Raheb writes.

The collection features characters and motifs from Ukrainian folklore, including an enchanted mirror and a magic egg.

MatrixGold 3.11, the newest version of the jewelry design program, offers more flexibility, precision, and creative control.

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

The pavilion will be part of the 2026 JA New York Spring show, scheduled for March 15 to 17.


Kadet, a 1994 National Jeweler Retailer Hall of Fame inductee, helped grow the family-owned retailer in the Chicago area and beyond.

Billed as the world’s smallest wearable, Lumia Health’s new smart earrings have a health tracker subtly embedded in the back.

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

Don’t let those with December birthdays feel blue. Help them celebrate their month with blue zircon, turquoise, and tanzanite.

The new pink sapphire version of the piece dances with its wearer in the brand’s “Icons After Dark” holiday campaign.

A choice that’s generated a lot of commentary, Pantone says “Cloud Dancer” marks a fresh start and encourages relaxation and creativity.

The manufacturer’s holiday campaign features a gift guide filled with trending designs and jewelry that can be personalized.

The man was charged with theft, accused of ingesting the necklace while in a jewelry store in Auckland, New Zealand.

The Florida independent expanded its store from 8,000 to 14,000 square feet, fulfilling the vision of its late co-founder, Jim Dunn.

Sponsored by De Beers Group

The classic 5600 series G-Shock has been scaled down to about a tenth of its size, becoming a fully functioning watch ring.

The association’s annual conference and gala will take place Feb. 4, 2026, during the Tucson gem shows.

The January show will include a workshop for jewelry retailers on implementing AI to strengthen their businesses.

Fellow musician Maxx Morando proposed to the star with a chunky, cushion-cut diamond ring designed by Jacquie Aiche.

The retailer, which sells billions in fine jewelry and watches, is suing the Trump administration and U.S. Customs and Border Patrol.

Black Friday is still the most popular shopping day over the five-day holiday weekend, as per the National Retail Federation’s survey.

The retailer offered more fashion jewelry priced under $1,000, including lab-grown diamond and men’s jewelry.

The eau de parfum is held in a fluted glass bottle that mirrors the decor of the brand’s atelier, and its cap is a nod to its “Sloan” ring.

Vivek Gadodia and Juan Kemp, who’ve been serving as interim co-CEOs since February, will continue to lead the diamond mining company.

In addition, a slate of new officers and trustees were appointed to the board.

Witt’s Jewelry in Wayne, Nebraska, is the organization’s new milestone member.

Laurs is the editor-in-chief of Gem-A’s The Journal of Gemmology and an expert on the formation of colored gemstone deposits.























