While some designers do use signatures as part of their branding and authenticity markings, Elsa Peretti's jewelry is primarily authenticated by the following:
* Hallmarks: Most Tiffany & Co. pieces, including those designed by Elsa Peretti, have hallmarks that include the Tiffany & Co. logo, metal purity, and sometimes the year of manufacture.
* Certificate of Authenticity: If the jewelry comes with a certificate issued by Tiffany & Co., it is generally considered authentic.
* Expert Authentication: Reputable jewelers, appraisers, or auction houses can examine the piece and provide an expert opinion on its authenticity.
It's important to note that counterfeiting is a problem in the luxury jewelry market, and it's always best to purchase from reputable sources. If you have any doubts about the authenticity of a piece, it's best to seek expert advice.