NEW YORK—An electrical fire in a transformer that serves the Tiffany & Co. store on New York’s Fifth Avenue spewed thick gray smoke from under the iconic building on Thursday and caused two minor injuries, officials said. The fire did not spread to the store itself, but firefighters evacuated about 100 people from the building…

By Amanda Breen Tiffany & Co. is currently selling its most expensive piece of jewelry ever. “The World’s Fair Necklace,” unveiled in Dubai on Sunday, boasts a dazzling 180 carats of diamonds set in platinum. The 578 total diamonds include 353 round brilliant cut stones and 224 custom-cut baguettes. The centerpiece is an 80-carat oval, flawless D-color (highest grade and virtually colorless)…

NEW YORK—Tiffany & Co has settled its more than eight-year-old lawsuit accusing Costco Wholesale Corp of trademark infringement and counterfeiting for selling generic diamond engagement rings bearing the “Tiffany” name. Monday’s settlement came after the federal appeals court Manhattan in August threw out a $21 million judgment that Tiffany, acquired in January by French luxury…