I have experimented with quartz crystals, water and the sun also and experienced many very positive results. But I used them a little differently... If you put your crystal in the water AS it is in the sun and leave it there for a period of time, it seems to have much more powerful effects. I would suggest only glass bottles for this and clear ones let in the most sunlight.
After doing more research I found that computer scientist Marcel Vogel and inventor Patrick Flanagen had also done extensive studies with quartz crystals and water, with findings such as when crystals are left in water for a period of time they:
**boost the electrical conductivity of the water
**decrease the surface tension of the water
**increase the alkalinity levels of the water
All of these results allow for the human body to operate much more smoothly, just looking at it from a scientific standpoint. I wouldn't be surprised if this helped the body eliminate or alleviate many forms of disease, in fact I'm sure of this myself.
The first gulp of sun-charged "crystal water" I ever tried as an experiment one day instantly made my body feel better... as I was having a bought of severe nausea with my whole body feeling extremely lousy. Immediately after tasting this one gulp my body was completely back to normal. I then began drinking this sun-charged crystal water daily with many other benefits to follow.
I would suggest using as clear a crystal as you you can find, as I think some of the benefits come from the fact that when a clear quartz crystal is put perpendicular to the sun, in direct sunlight, it will project the full spectrum of colors out two different faces of the crystal... thereby charging the water, if in water, with the full spectrum of light waves. This is just one of the many things which happen when utilizing the amazing properties of these quartz crystals.
All the Best...