I have a varigamma, I love mine! I cured myself from macular degeneration,(which there is supposidly no cure for) arthritis, I always feel better after using it in other areas, kidneys, liver. I m having fun programing different areas.
I dont know much about quarts crystal (actually know nothing at all) but does sound interesting. Ive been using zapper since 1996, never get sick, always feel good. The electrodes are great, stick them on any area, there ya go.
I'll be looking into crystals possibly buy one some day soon as I hit the lottery.