On Aug. 14, Costco got hit with a judgment directing it to pay Tiffany more than $19 million for selling about 2,500 diamond rings (paywall) it marketed as “Tiffany” rings. The amount includes $11.1 million—three times the estimated profits Tiffany lost from Costco’s infringement, plus interest—and another $8.25 million in punitive damages.

The case has been going on since Tiffany filed its first complaint against Costco on Valentine’s Day (Feb. 14) of 2013, after Tiffany became aware that Costco was using its name on store signage. Costco has argued that it was using “Tiffany” to refer to the style of setting, and that it never led customers to believe the rings were actually made by Tiffany.

The court, though, ruled Costco repeatedly used “Tiffany” as a standalone term, rather than specifying “Tiffany setting” or “Tiffany style.” US district judge Laura Taylor Swain also noted that the store had placed rings with standalone “Tiffany” signs near displays of name-brand luxury watches, and salespeople described rings as “Tiffany” to customers. She added that Costco’s upper management “displayed at best a cavalier attitude toward Costco’s use of the Tiffany name in conjunction with ring sales and marketing.”

In a statement, Leigh Harlan, Tiffany’s senior vice president and general counsel, said: “We brought this case because we felt a responsibility to protect the value of our customers’ purchases and to ensure that Costco‘s customers were not mislead about their purchases. It is critically important that the Tiffany name not be used to sell any engagement ring that is not our own.”

Costco plans to fight the ruling. “Costco respectfully submits that the ruling is a product of multiple errors in pretrial, trial, and post-trial rulings and intends to appeal,” it stated, saying that Costco had changed its signs to remove all references to Tiffany after the company first complained to Costco back in 2012.

As part of Swain’s ruling, Costco is permanently banned from using “Tiffany” as a standalone term in its marketing and signs.

📬 Sign up for the Daily Brief

Our free, fast, and fun briefing on the global economy, delivered every weekday morning.