I would like to share my experiences with this and will keep the forum updated. On explaining to my mum what I had been shown , unsuprised ma says" Your Grandfather had a friend who used to locate the water for people to drill thier water bores (she began to cry a little in remebering the property "oakvale " 80 mile west of Gunnedah). Back in the 40's
Apparently the man- back then old and bent over -would take some fencing wire and find the underground water in a dry and harsh region. It was rumoured he only ever got it wrong twice in hundreds of bores.
I think however silver alloy was important content for divining for gems , the man who showed me the "wires" had 20% silver quite thin gauge braising wire.
I picked up some 5% silver braising rods at 16 dollars- holding off on the 50% silver rods due to they are pretty pricy.
So after some research it appears to be all related to the specific gravity of elements. Example. If your array (wires) are balanced well and you maintain that delicate balance it is easy for changes in background gravity to "swing" the wires out of balance.(the way you hold the wires is critical)
This would occur when passing over water, dense minerals, areas of altered magnetic resonance and one would image once one is atuned to the various "feel" of what is what one would be rather clever. So I am off with my current specimens to play hide and seek with my wires.
I think defining the different response of the array to what mineral/gem/metal/water/ect will prove to be the real defining skill as passing over an underground water course would currently be little different to passing over a one ton nugget to me (twenty minutes experience so far lol).
Depth perception would also be a very crucial skill but clearly these can be mastered skill as water deviners can often tell you the approximate depth as well.
The man told me many people are shown how to do it, but few are actually able to balance and read the array due he siad to lack of electrical/magnetic sensitivity and "charge" only 20-30% of people he had shown were able to do it. The others had no response from the wires as "thier charge/response was wrong for the task".
Happy hunting