Guide
The ping test for silver coins.
Balance a coin on a fingertip and tap it with another coin, and a genuine silver coin rings with a clear, sustained tone. The test works by comparison: a fake made of other metals rings differently from the real thing.
Updated October 28, 2026
Why coins ring differently
A coin's ring is its natural frequency, set by its thickness, diameter, stiffness, and density. Two coins of the same size and design but different metals ring at different pitches. That's why the test only works by comparing a coin with a known genuine coin of the same type.
How to do it
- Balance the coin on a fingertip so it can vibrate freely, and tap its edge lightly with another coin.
- Listen for a clear, sustained ring. A dull clunk suggests the wrong metal, a crack, or a layered fake.
- Compare with a genuine coin of the same kind, or use a phone app that measures the frequencies and compares them with known coins.
Its limits
Worn, holed, or damaged coins ring differently from new ones, the test needs a known reference coin, and it says nothing about jewelry or odd shapes. It's a good screen for common bullion coins, not proof. See how to test silver for the other tests.
Sources
- Peer-reviewed study of coin vibration, PubMed Central PMC9740311 (how size, stiffness, and density set a coin's frequency).
Silver tests: How to test silver · Specific gravity · XRF · Sigma verifier · Magnet · Acid · Ice · Ping · Is my silver real? · Silver stamps
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