which LRL

[daryo]

Hello
I have a question please answer i know all of members can answer except me!!

Is any LRL (pd-mfd-pistol-&,,,) can detect fresh gold ?(not at underground) i mean if i have a gold ring in my pocket , is LRL detect it from another room ?(5-6 meter distance)
If it is possible ,how LRL do that ?
If some LRLs use by variant sistems (X-ray ,gamma, magnometer or radio waves or....)Which LRL is the best ?
Many thanks