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Tiffany lawsuit shines light on Costco diamonds
NEW YORK — Jewelry maker Tiffany & Co. is suing Costco Wholesale, alleging that the club retailer falsely marketed diamond engagement rings as coming from the New York-based jeweler, according to published reports.
News media reported that Tiffany filed suit against Issaquah, Wash.-based Costco in the Federal District Court in Manhattan.