The recent high jewelry auction, which also featured the sale of a 10-carat blue diamond, was “a celebration of color.”
Tiffany v. Costco Battle Moves into Trial Mode
Jury selection is slated to begin this week in the trial phase of Tiffany’s ongoing case against Costco over its sale of rings falsely labeled as having a Tiffany setting.

New York--Jury selection is slated to begin this week in the trial phase of Tiffany & Co.’s ongoing case against Costco Wholesale Corp. over its sale of rings falsely labeled as having a Tiffany setting.
The online docket for the U.S. District Court for the Southern District of New York shows that jury selection was scheduled to begin Monday morning in front of U.S. District Judge Laura Taylor Swain.
Swain is the same judge who ruled in Tiffany’s favor in September 2015, determining that warehouse retailer Costco had infringed on and counterfeited the Tiffany trademark when it sold non-Tiffany-made rings that were labeled as having a “Tiffany setting.”
In what was a major victory for Tiffany, Swain also dismissed Costco’s counterclaim that the term “Tiffany setting” had become genericized and could be used to describe any setting with multiple, slender prongs that extended upward to hold a single gemstone.
The purpose of the jury trial, which originally was set to take place in January, is to determine monetary damages in the case, including profits from the sale of the rings and punitive damages.
Costco declined to comment on the case.
The Latest

She wore the “Le Cauri Endiamanté” earrings, our Piece of the Week, in the Obamas’ first dual portrait for the Obama Presidential Center.

Couture’s Michelle Orman joins Amanda Gizzi and Michelle Graff for this special post-Market Week episode of My Next Question.

Colored gemstones, artisan finishes, mixed metals, and meaningful details are shaping demand in bridal jewelry.

The lab is seeing emeralds with filler added post-testing enter the market, accompanied by reports that indicate little to no treatment.


The third generation of the Stern family to head Patek Philippe, he navigated the “quartz crisis” and preserved the brand’s independence.

Marianna Smirnova previously spent a decade working with the Responsible Minerals Initiative, in addition to other relevant roles.

DCA is preparing the next generation of professionals by supporting workforce development, leadership growth, and career advancement.

The New York Knicks took home the Larry O'Brien Trophy crafted by Tiffany & Co.

Associate Editor Natalie Francisco lists the trends she spotted during Jewelry Market Week that will dominate the second half of 2026.

Its app now reflects increased prices for Mozambique ruby, as well as changes to its Burma ruby charts.

The manufacturer has tapped Alicia Arnold, the former director of custom design at Tiny Jewel Box.

The revamped, elevated space will feature a two-story Patek Philippe atelier and a rooftop patio for parties.

The special-edition piece marks the 140th anniversary of the iconic beverage brand.

Here are 13 small charms to inspire your layered looks this summer.

Found by a metal detectorist, the ring likely belonged to a wealthy, possibly royal, owner, said Noonans.

Our Pride Month Piece of the Week, the “Margaux” ring, is part of the wife-and-wife team’s new “Lovestoned” collection.

The group has named the keynote speaker and announced a new pavilion for its next event, which is slated for September.

From lions and hippos to snails and fish, Senior Editor Lenore Fedow wrangles her picks for cutest jewelry critters in Las Vegas.

The big stone will be fashioned into a 20.26-carat diamond in celebration of the retailer’s 100th anniversary this year.

Marie-Laure Cérède will join Chanel as the new director of its jewelry creation studio, starting in October.

At the JCK show, the lab-grown diamond brand teamed up with Jewelers for Children to support Make-A-Wish India.

Ilana McCabe is Signet’s vice president of public relations and brand communications.

It was a banner day for blue gemstones, with another blue diamond topping $8 million and a 41-carat sapphire going for $2.3 million.

The approval means the retailer is on track to exit bankruptcy proceedings this summer.

The men are believed to be part of the group of several masked suspects that robbed Marc Robinson Jewelers in April.

The bridal-focused brand is also launching its Custom Atelier this summer, a digital custom design tool for its authorized retailers.






















