Costco claimed the rings had a pronged setting typically referred as a "Tiffany setting," but the court ruled some of the display cases did not properly distinguish between an authentic "Tiffany" ring and the style setting.
A federal district judge ruled Tiffany is entitled to $11.1 million in profits for infringing on the jeweler's trademark, in addition to interest, and $8.25 million in punitive damages. Costco is planning an appeal.