LRL LONG RANGE ION DETECTOR, It works!

This is not a metal detector. It detects ions.
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Buried gold releases positive ions. Gold ions in the soil have a +3 charge. Scientists have discovered that long-time buried gold does corrode. The amount is much less than for copper, but enough gold corrodes and emits gold ions to go into solution with the soil around it and migrate up to the surface, where it quickly becomes bound with elements at the surface and becomes part of the soil as a gold compound or microscopic metallic gold. Although the process is slow, large amounts of gold are moving in the soil by this method. The corrosion of gold under the ground is not something that would happen easily above the surface, because there are colonies of microorganisms below the surface that secrete chemicals such as cyanide and sulfur complexes which are capable of dissolving gold and suspending it in the soil as ions. A particular strain of gold-attacking bacteria thrives dark places without much oxygen like in the soil or rock crevices below the soil. These have been discovered as deep as 2 miles below the surface in gold mines, as well as near the surface of the ground.