I love crystals and have many, some vogel cut, mostly natural ones...and many rocks some very plain but then again they hopped in to my pockets...
I learned dowsing in the early 80's and we dowsed alot of austin. Also many other things. I learned to use it in diagnosing in my energy healing work too. it is a very creative tool to learn alot from most everything.... discerning the energy of buildings, the nature of vortices, direction of energy, placements and edged of various energy fields.... if you can imagine a use for it, it probably will work.
It is great for earth related anomolies.... what i enjoyed the best....