Anonymous ID: 3b546d July 20, 2018, 5:44 p.m. No.2226142   🗄️.is 🔗kun   >>6192

>>2225954

The technology to test under the surface of precious metals is publicly available. It's a little expensive at the moment, but could easily turn into a smart phone app and sensor that plugs into your phone.

 

https://buysigmametalytics.com/products/sigma-metalytics-precious-metal-verifier-basic-set