Someone answered that if a piece of jewelry doesn't have the .925 Stamp, then it's a "fake". This is not necessarily true. If you were looking at older jewelry, say Art Deco 1920-1935, it might not say 925. Quite often it says "sterling", sometimes "silver" and sometimes nothing at all. It was later that the practice of stamping with 925 became standard. The only way to be sure of theses older pieces is to test. Acid test is best, but a quickie check is to use a magnet. Silver is NOT drawn by a magnet, but non silver & silver plate will be drawn to it because of the base metal.
Avid Art Deco jewelry collector