The supplier has a curated list of must-have tools for jewelers doing in-house custom work this year.
Appeals Court Reverses $21M Judgment Against Costco in Tiffany Case
The closely followed trademark case over use of the “Tiffany” name is going back to the district court for a trial by jury.

Tiffany & Co. sued Costco in early 2013 for selling rings in its stores with signs that read “Tiffany” that were not made by Tiffany & Co.
Costco argued in a countersuit that “Tiffany” had become a generic term that could be used by any company to describe a particular style of ring setting (multiple slender prongs holding a single stone).
In 2015, the U.S. District Court for the Southern District of New York granted Tiffany’s motion of summary judgment of liability, and in 2017, a civil jury awarded the jeweler damages totaling about $21 million.
Costco appealed the judgment and won, with the Second Circuit Court of Appeals reversing the decision.
In a filing Monday, the appeals court the said question of liability for infringement and counterfeiting should have been presented to a jury during the first trial, rather than be decided by the district court judge.
In a 3-0 decision, the appeals court judges said “reasonable” jurors could find Costco’s use of the word “Tiffany” wasn’t likely to confuse customers or make them think the latter had produced or endorsed the rings.
They could understand “Tiffany” wasn’t only a brand name but also “a widely recognized descriptive term for a particular style of pronged ring setting.”
The case has been remanded to U.S. District Judge Laura Taylor Swain in Manhattan for a jury trial.
“We are disappointed in the court’s ruling … We continue to believe that the district court was correct in its findings, and that the jury’s finding on damages, which resulted in a $21 million award for Tiffany & Co., is a clear indicator of the strength of the Tiffany brand, and of the jury’s outrage over Costco’s actions,” said Leigh Harlan, Tiffany senior vice president, secretary and general counsel.
“We have no qualms about trying this case again and remain confident that a jury will find counterfeiting and infringement upon retrial, just as the district court judge originally ruled.”
The attorneys at Debevoise & Plimpton LLP, which represented Costco in the appeal, declined to comment on the ruling.
The Latest

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

The governing board welcomed two new members, Claire Scragg and Susan Eisen.

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

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.

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

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.

It marks the third time the country has headed the Kimberley Process. Ghana will serve as vice chair.

The new Bulova x Stetson designs highlight two animals often associated with the American West—the bison and the Texas Longhorn.

Its residency at Yamron Jewelers will run through May 2026.

From influential executives to innovative designers, we pay tribute to the people we said goodbye to this year.

The retailer is expanding into areas with large Indian and South Asian populations.

The Italian brand has opened its first flagship amid the peaks of the Dolomites in Madonna di Campiglio, Italy.

The new curation at the Natural History Museum of Los Angeles County showcases rare gem and mineral specimens in their uncut, natural state.

The couple pleaded guilty to concealing at least $127 million in cash transactions at its precious metals businesses.

Consumers shared concerns about prices, inflation, tariffs, trade, and politics in the survey’s write-in response section.

In February 2026, the auction house will move its headquarters to the former Steinway Hall, a neoclassical landmark on Billionaires’ Row.

The new show will take place Jan. 23-25, 2026.

The former BHP Billiton leader and Gemfields chairman is remembered for his influential leadership throughout his 50-year mining career.

The LVMH-owned brand has partnered with the costume design union to revamp its award for 2026.





















