How do I identify vintage Tiffany jewelry?

To identify vintage Tiffany jewelry, see if you can find either a “Tiffany Co.” or “T&Co.” stamp, as nearly all pieces produced by the luxury jewelry maker will display one or the other. Engagement rings made during the late 1960s and beyond will also usually have a serial number, which you can research. However, it is usually inscribed onto the gemstone's girdle in characters too small to be read with the naked eye. If your piece is a diamond ring, you can take it to an authorized Tiffany Co. repair center to have the serial number read and researched to learn more about it. For all other types of jewelry, you can either conduct online research to determine if it is between 20 and 99 years old, making it vintage, or you can have a certified appraiser or experienced dealer help you with the identification process. On 1stDibs, explore a wide variety of vintage Tiffany Co. jewelry.