How do you test your gold? I just did the ping test on these coins and they failed. I bought from a reputable dealer online. How do you test your coins?

Precious Coin Tester - Apps on Google Play

Precious Coin Tester - Apps on Google Play

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Buy The Pocket Pinger - Coin Ping Tester Online - Pure & Authentic

How do gold buyers check if the gold they're buying is real or fake? What techniques are they using? - Quora

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How to Know If Gold is Fake or Real

4 Ways to Tell if Gold Is Real - wikiHow

The Pocket Pinger + Stack Stick, Coin Ping Test (Black, 1 Pack) : Toys & Games

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How to Know If Gold is Fake or Real