Does Tiffany authenticate jewelry?

No, Tiffany does not authenticate jewelry in its store or through its official website. To tell whether Tiffany jewelry is real, look for metal hallmarks. Silver pieces should stay "Sterling" or "925." Tiffany & Co. uses the 750 stamp for its 18-karat gold jewelry and the 950 stamp for platinum. Not only should a hallmark be present, but the spacing on the numbers or letters should be neat and properly aligned on the jewelry. For assistance authenticating a piece, consult an expert appraiser or dealer. Find a wide range of Tiffany & Co. jewelry on 1stDibs.