Some marks come with trademark or number code, which imply some important Tiffany Jewelry Necklaces Delicate Red Transparent information about the jewelry. Do you know what the meaning of the mark of 92.5 on the Tiffany Jewelry is It is the silver standard in the US which gives the silver content. That means Tiffany Jewelry Necklaces Delicate Petals Of Silver Snow the silver is made of 92.5 percent sterling silver and 7.5 percent alloy which can make the jewelry much more durable. In the Tiffany Jewelry store, all the jewelry has the mark of the brand logo "Tiffany & Co." and others have the graven.