Retail giant Costco Wholesale (COST) is known as a place to buy products in bulk, such as 30 rolls of toilet paper or a 40-pound tub of sugar. Less known as a source for diamond engagement rings, ...

NEW YORK -- A Tiffany & Co. subsidiary is suing Costco, claiming the wholesale club operator has been selling engagement rings wrongly labeled Tiffany rings. The high-end jeweler filed lawsuit in U.S.

NEW YORK — Costco’s going to pay for selling “Tiffany” engagement rings that weren’t made by Tiffany. U.S. District Judge Laura Taylor Swain ruled on Monday that Tiffany is entitled to $11.1 million ...

In 1886, Charles Lewis Tiffany introduced the solitaire Tiffany Setting, a simple six-prong design that became the industry standard and remains a bestseller. Ever since, generations of young couples ...

A federal judge ruled Monday that Costco Wholesale Corp must pay at least $19.4 million in damages to Tiffany & Co. after the luxury brand accused the chain store of selling rings falsely identified ...

Tiffany & Co sued Costco Wholesale Corp on Thursday to stop the largest U.S. warehouse club chain from selling what it called counterfeit diamond engagement rings bearing the luxury retailer's name.

Tiffany and Company is alleging trademark infringement and counterfeiting. Feb. 15, 2013 — -- Famed jeweler Tiffany and Company is suing warehouse store giant Costco, claiming it sold knockoff ...

Tiffany sued Costco on Thursday to stop the largest U.S. warehouse club chain from selling what it called counterfeit diamond engagement rings bearing the luxury retailer's name. The trademark lawsuit ...