Check for a sterling silver hallmark such as 925, .925, Sterling, or Ster
Look for tarnish; sterling silver often darkens or blackens over time
Use a magnet; sterling silver is not magnetic
Check the weight; sterling silver feels relatively heavy for its size
Rub it with a soft white cloth; real silver may leave a dark residue
Use an acid test kit designed for silver
Use a silver testing stone and testing solution
Listen for a ring test; sterling silver often produces a clear, high-pitched sound
Inspect for corrosion; sterling silver may show slight oxidation but not rust
Have it tested by a jeweler or appraiser