The 23-carat fancy vivid blue diamond, set to headline Christie’s May jewelry auction, was expected to sell for as much as $50 million.
For new campaign, Gemfields roughs it
Gemfields has a new advertising campaign and emerald-focused tome, and the colored gemstone miner celebrated both amid the snow Monday at the St. Regis Hotel in New York City.

Shot by portrait photographer Peter Lindbergh, the advertising campaign is the second for the London-based mining company, which mines emeralds and amethysts in Zambia along with rubies in Mozambique. The company has said it will hold its first ruby auction this year.
As the first did, the ad campaign features actress and Gemfields ambassador Mila Kunis, who was in attendance at Monday night’s fête.
The mining company announced Kunis as its ambassador in early 2013, and the actress, who got her start on That 70s Show, voices Meg on Family Guy and won a Golden Globe for Black Swan, traveled to Gemfields’ emerald mine in Zambia later that year.
The theme of the new campaign, a follow-up to the first that featured Kunis in finished, polished gemstone jewelry, is “Beauty by nature.” It was shot in black and white, with the actress wearing no makeup and images of rough emeralds, rubies and amethysts superimposed on the edges.
A London-based mining company with operations in Africa, Gemfields has said publicly that its goal is to become, essentially, the De Beers of emeralds: create a stable market for the colored gemstone and enhance its image worldwide.
The miner, however, ran into a roadblock in 2013 when issues with the Zambian government resulted in Gemfields not holding any auctions of rough emeralds outside the country as planned. This caused the mining company to hold one less auction in 2013 and, ultimately, to see a drop in both sales and profits for the year.
Gemfields next emerald auction is scheduled for Feb. 21 to 25 in Lusaka, Zambia. It was not immediately clear if the mining company would be holding all its auctions in Zambia going forward.
In addition to its new advertising campaign, Gemfields on Monday also marked the release of a hardcover coffee-table book, simply titled Emerald. It was authored by jewelry expert Joanna Hardy and writer Jonathan Self, with a preface by Vogue Italia Editor Franca Sozzani and introduction by British author Hettie Judah.
On the book’s cover is a suite of emerald jewelry owned by Mary-Louise, Archduchess of Austria, the second wife of Napoleon I.
The 272-page book, which retails for $125 and is available wherever
The gemologist took the class back to ancient Egypt, where the emeralds were mined in what later came to be called Cleopatra’s Mines--after the famous Queen of the Nile who loved her gemstones-- and then to Colombia.
The South American country is known for producing the finest emeralds in the world in terms of color and remains the world’s top producer of the gemstone today. According to Hardy’s presentation, 38 percent of emeralds come from Colombia, 29 percent from Zambia, where Gemfields mines, 23 percent from Brazil and 10 percent from other countries.
Hardy also gave a brief overview of the mineral composition of emeralds during her presentation.
A variety of beryl, emeralds are beryllium aluminum silicate, with chromium, vanadium and iron coming together in varying levels to give them their green hue. They rank 7.5 on the Mohs scale of mineral hardness, below corundum (rubies, sapphires, etc.) at 9, and the hardest substance on earth, diamond, which is 10.
Editor's note: This story was updated to include information from Gemfields about their emerald auctions.
The Latest

G.B. Heron Jewelers in Salisbury, Maryland, is set to close as its owner, Jeff Cassels, retires.

Emmanuel Raheb outlines the differences between the two platforms and posits that the most successful jewelers use both.

Supplier Spotlight Sponsored by GIA

The miner said its April sale featured a mix of commercial-quality primary rubies and secondary rubies of varying quality.


U.S. customs agents in El Paso, Texas, intercepted the package, which would have been worth $9 million if the jewelry was genuine.

Health monitors become statement pieces when paired with the brand’s new collection of stackable diamond-studded bands.

Six new retail businesses were selected for the 2025 program, which began in January.

Ten organizations were selected this year.

Kim Carpenter and Sam Gevisenheit have joined the brand.

“Shell Auranova” is the next generation of the brand’s bridal line, featuring half-bezel engagement rings with bold and fluid designs.

Boucheron and Pomellato performed well in an otherwise bleak quarter for Kering amid struggles at Gucci.

Designer Deborah Meyers created her birds from oxidized sterling silver, rose-cut diamond eyes, and Akoya Keshi pearl feathers.

The company said it expects sightholders to remain “cautious” with their purchasing due to all the unknowns around the U.S. tariffs.

Sponsored by the Gemological Institute of America

Simon Wolf shares why the time was right to open a new office here, what he looks for in a retail partner, and why he loves U.S. consumers.

A third-generation jeweler, Ginsberg worked at his family’s store, Ginsberg Jewelers, from 1948 until his retirement in 2019.

The company failed to file its quarterly reports in a timely manner.

The organization also announced its board of directors.

Charms may be tiny but with their small size comes endless layering possibilities, from bracelets to necklaces and earrings.

Located in Valenza, the now 355,000-square-foot facility includes a new jewelry school that’s open to the public, Scuola Bulgari.

Paola Sasplugas, co-founder of the Barcelona-based jewelry brand, received the Fine Jewelry Award.

A platinum Zenith-powered Daytona commissioned in the late ‘90s will headline Sotheby’s Important Watches sale in Geneva next month.

The basketball stars wear men’s jewelry from the “Curb Chain” collection.

The Signet Jewelers-owned retailer wants to encourage younger shoppers to wear fine jewelry every day, not just on special occasions.

The 21 pieces, all from a private collector, will be offered at its Magnificent Jewels auction next month.

Lilian Raji answers a question from a reader who is looking to grow her jewelry business but has a limited marketing budget.