According to Harner, Quartz Crysals', when used "correctly" have the effect of "amplifying whatever spirit power is being put into them." .
List of Connection Appliances
In shamanic and New Age practice, quartz crystals are used to amplify and focus Connection. One women I knew used to place a quartz crystal beneath her chair before she initiated a Trance Channeling session.
- Harner, Michael. Cave and Cosmos: Shamanic Encounters with Another Reality. Berkeley, California: North Atlantic Books, 2013