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Originally Posted by katana
Interesting ways of silver testing, thanks Gene also found this....
Cool Down
Use an ice cube to test the purity of your silver. This process works best with smaller pieces, such as silverware. Take a small ice cube, and place it on your silver item. If the entire utensil cools down within 10 seconds, you are working with real silver. If it takes closer to 30 seconds, it may be silver plated. This test is not the most scientific, but it will be a broad indicator and will help you decide whether you would like to test further.
All the best
David
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The only problem I see with this is if the piece is copper with silver plate - heat disperses instantly with silver and copper.