In this video, I explain the reason why you should NOT test your 90% silver using the Basic Sigma Metalytics Precious Metals Verifier. This Basic machine only tests the resistivity of a metal and in this case, 90% silver and Clad coins have a similar resistivity, giving you a false positive.

Instead, you may want to use a ping tester to authenticate your 90% silver coins or conduct a specific gravity test with some simple tools like a bottle of water, an inexpensive precision balance, and floss. Below are the links where you can purchase a decent balance and a ping tester. Thanks for watching!

Pocket Pinger - https://coinpingtest.com/

Precision Balance - Fuzion Digital Pocket Scale, 200g x 0.01g Jewelry Gram Scale, 6 Units Conversion Mini Scale with LCD Display, Tare Function for Food, Jewelry, Medicine, Coffee (Battery Included) https://a.co/d/eDlVL1g