Stone elixirs can be quite powerful. The most in-depth book I have found, recommended by a stone-savy friend, is Gem Elixirs and Vibrational Healing, Vol.I, by Gurudas. A stone or stones (rough or crystalline) are placed in distilled water and after a time drops are placed into water in order to dilute for drinking. The elixir can be stored in a glass jar and labeled for later. In this way, one can create elixir stone combinations. The book has combinations for a wide variety of conditions. If I wanted to learn about elixirs, I would start here.
Another way--my usual way, perhaps I'm lazy--is to play with stones energetically. Energy recognizes no barriers, matter being congealed energy. If I want to clear, balance or do anything else to water or food (Reiki does a fine job), I place stones nearby or simply ask them to participate from a distance and/or another time. No need to drop stones into one's drink, other than interest and of course, fun. ;-)
One day I placed a large dry-looking jelly opal into a container filled with tap water. It sat on the kitchen counter awhile, then my cat started drinking the water! "What? Isn't that a little strong?" I asked her. Apparently not. She stopped requiring waterhole (toilet) access and drank the jelly opal water for years. After that, I asked which stone would like to sit in Popurrie's water, then I placed the stone into her water bowl. She enjoyed the game and let me know when it was time for a change, or that she preferred a different stone. She was a small cat with the stone tolerance of something huge.
Cats!