Gold Lock

Validation of precious metals; specifically tungsten concealed in gold coins, bars and bullion. This is accomplished with a hand held scanner (patent #9,334,639) that illuminates magnetic disturbances due to hidden anomalies (e.g, tungsten concealed in gold and silver). Tungsten and gold have nearly identical densities which unscrupulous counterfeiters use to imitate gold. These imitations are difficult to detect with non-destructive testing. Most illegitimate fakes pass for legitimate gold because collectors and investors are unwilling to test a coin by drilling or cutting. The solution is to use Gold Lock's hand scanner which quickly and easily test precious metals for the presence of inexpensive tungsten.