Keep it in the freezer until you need it for the test. While it might not seem like ice and silver go together, silver has the highest thermal conductivity of any common metal or alloy, though copper is right behind.


This test works well with coins and bars but will be harder to perform on silver jewelry.
 Do not take your eyes off of it. The ice will begin to melt immediately, as if it has been placed on something hot, rather than as if it it was placed on something that was just room temperature.
Have some ice on hand.
Place your piece of ice directly on the silver.
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