How to Test for Silver Plate

How to Tell the Difference

• 1). Look for a sterling mark. A sterling mark will read "Sterling" or may read ".925" or "925/1000," which signifies the percentage of pure silver content. However, the absence of these marks does not necessarily mean the item is not genuine silver. If there is no mark, use another testing method.
  
  
• 2). Inspect the piece for copper-colored patches or flaking. These are indications that the silver plate has worn away to reveal the cheaper copper or brass underneath. (Reference 2)
  
  
• 3). Rub the metal firmly but gently with a cloth. If the piece is genuine silver, a black tarnish may rub off on the cloth.
  
  
• 4). File the piece lightly in an inconspicuous spot to determine if there is brass or copper underneath.
  
  
• 5). Apply a tiny amount of nitric acid to an inconspicuous area. Wear goggles to protect your eyes from splatter. The acid will turn silver plate green or black. If it turns pale, the piece is genuine silver.
  
  
• 6). Take the piece to a professional appraiser if the tests are inconclusive.