92.5 mark inside of the rings, charms or bangles, the clasp of necklaces or bracelets. The jewelry without any marks must be unreal ones. And the mark often is marked as.925. A few Tiffany Jewelry with the mark of 950, which means it contains more sterling silver with less alloy. You can also check the marks from the official store carefully to recognize the real jewelry. Do not forget to get the invoice from the seller when Tiffany Jewelry Necklaces Exquisite Circle Bar you buy it. Most probably, the seller doesn't have the invoice for the fake ones..