Check for hallmarks such as 925, Sterling, .925, or Silver
Use a magnet; silver is not magnetic
Test with a silver acid testing kit
Rub with a soft white cloth to check for tarnish transfer
Weigh it and compare to known silver items of similar size
Listen for a high, clear ring when gently tapped
Use a jeweler’s loupe to inspect markings and wear
Test thermal conductivity with an ice cube; silver conducts heat quickly
Use an electronic precious metal tester
Have it verified by a professional jeweler or appraiser