Pursuits

Tiffany Sues Costco Claiming It Sells Counterfeit Jewelry

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Tiffany & Co. accused Costco Wholesale Corp. in a lawsuit of selling counterfeit Tiffany diamond engagement rings at discount big-box prices not befitting the mystique of its iconic blue-box.

Costco isn’t authorized to sell Tiffany items, the New York-based jewelry retailer said in a complaint filed yesterday in federal court in Manhattan.